diff --git a/.github/ISSUE_TEMPLATE/bug_report.yml b/.github/ISSUE_TEMPLATE/bug_report.yml
new file mode 100644
index 0000000..a1bbad5
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.yml
@@ -0,0 +1,62 @@
+name: Bug Report
+description: File a bug report
+title: "[Bug]: "
+labels: ["bug"]
+assignees:
+  - octocat
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: input
+    id: contact
+    attributes:
+      label: Contact Details
+      description: How can we get in touch with you if we need more info?
+      placeholder: ex. email@example.com
+    validations:
+      required: false
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: Also tell us, what did you expect to happen?
+      placeholder: Tell us what you see!
+      value: "A bug happened!"
+    validations:
+      required: true
+
+  - type: textarea
+    id: version
+    attributes:
+      label: Version
+      description: What version of our software are you running?
+    validations:
+      required: true
+
+  - type: dropdown
+    id: platform
+    attributes:
+      label: What platform are you working on?
+      multiple: true
+      options:
+        - Mac Intel
+        - Linux
+        - Windows
+        - Mac M
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output in trace log mode. This will be automatically formatted into code, so no need for backticks.
+      render: bash
+
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Code of Conduct
+      description: By submitting this issue, you agree to follow our [Code of Conduct](https://github.com/ylab-hi/ScanNLS/blob/main/CODE_OF_CONDUCT.md)
+      options:
+        - label: I agree to follow this project's Code of Conduct
+          required: true
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..2bc5d5f
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,19 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ""
+labels: ""
+assignees: ""
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 32e2534..5a848ff 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,3 +8,8 @@ updates:
       # Prefix all commit messages with "deps: ", which should be
       # accepted as a conventional commit and trigger release-please
       prefix: "deps"
+
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: daily
diff --git a/.github/labels.yml b/.github/labels.yml
new file mode 100644
index 0000000..f7f83aa
--- /dev/null
+++ b/.github/labels.yml
@@ -0,0 +1,66 @@
+---
+# Labels names are important as they are used by Release Drafter to decide
+# regarding where to record them in changelog or if to skip them.
+#
+# The repository labels will be automatically configured using this file and
+# the GitHub Action https://github.com/marketplace/actions/github-labeler.
+- name: breaking
+  description: Breaking Changes
+  color: bfd4f2
+- name: bug
+  description: Something isn't working
+  color: d73a4a
+- name: build
+  description: Build System and Dependencies
+  color: bfdadc
+- name: ci
+  description: Continuous Integration
+  color: 4a97d6
+- name: dependencies
+  description: Pull requests that update a dependency file
+  color: 0366d6
+- name: documentation
+  description: Improvements or additions to documentation
+  color: 0075ca
+- name: duplicate
+  description: This issue or pull request already exists
+  color: cfd3d7
+- name: enhancement
+  description: New feature or request
+  color: a2eeef
+- name: github_actions
+  description: Pull requests that update Github_actions code
+  color: "000000"
+- name: good first issue
+  description: Good for newcomers
+  color: 7057ff
+- name: help wanted
+  description: Extra attention is needed
+  color: 008672
+- name: invalid
+  description: This doesn't seem right
+  color: e4e669
+- name: performance
+  description: Performance
+  color: "016175"
+- name: python
+  description: Pull requests that update Python code
+  color: 2b67c6
+- name: question
+  description: Further information is requested
+  color: d876e3
+- name: refactoring
+  description: Refactoring
+  color: ef67c4
+- name: removal
+  description: Removals and Deprecations
+  color: 9ae7ea
+- name: style
+  description: Style
+  color: c120e5
+- name: testing
+  description: Testing
+  color: b1fc6f
+- name: wontfix
+  description: This will not be worked on
+  color: ffffff
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
new file mode 100644
index 0000000..9054eec
--- /dev/null
+++ b/.github/workflows/labeler.yml
@@ -0,0 +1,20 @@
+name: Labeler
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  labeler:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Run Labeler
+        uses: crazy-max/ghaction-github-labeler@v5.0.0
+        with:
+          skip-delete: true
diff --git a/.github/workflows/release-python.yml b/.github/workflows/release-python.yml
new file mode 100644
index 0000000..6bf2512
--- /dev/null
+++ b/.github/workflows/release-python.yml
@@ -0,0 +1,76 @@
+name: release-python
+
+# ref https://github.com/pola-rs/polars/blob/main/.github/workflows/release-python.yml
+on:
+  push:
+    branches:
+      - release
+  pull_request:
+    branches:
+      - release
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: PyO3/maturin-action@v1
+        with:
+          manylinux: auto
+          command: build
+          args: --release --sdist -o dist --find-interpreter
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: PyO3/maturin-action@v1
+        with:
+          command: build
+          args: --release -o dist --find-interpreter
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: PyO3/maturin-action@v1
+        with:
+          command: build
+          args: --release -o dist --universal2 --find-interpreter
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    if: "startsWith(github.ref, 'refs/tags/')"
+    needs: [macos, windows, linux]
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: wheels
+      - name: Publish to PyPI
+        uses: PyO3/maturin-action@v1
+        env:
+          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+        with:
+          command: upload
+          args: --skip-existing *
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3995e60..0644462 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,10 +1,31 @@
-name: CI
+name: CI-rust
 
 on:
   push:
-    branches: [master]
+    branches:
+      - main
+    paths:
+      - src/**
+      - examples/**
+      - Cargo.toml
+      - .github/workflows/test.yml
+
   pull_request:
-    branches: [master]
+    branches:
+      - main
+    paths:
+      - src/**
+      - examples/**
+      - Cargo.toml
+      - .github/workflows/test.yml
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+#ref https://github.com/pola-rs/polars/blob/main/.github/workflows/test-rust.yml
+env:
+  RUSTFLAGS: -C debuginfo=0 # Do not produce debug symbols to keep memory usage down
 
 jobs:
   Formatting:
@@ -12,6 +33,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -63,7 +86,9 @@ jobs:
             rust: stable
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
 
       - uses: actions-rs/toolchain@v1
         with:
@@ -86,10 +111,12 @@ jobs:
     needs: Formatting
     runs-on: ubuntu-latest
     env:
-      MSRV_VERSION: 1.62.0
+      MSRV_VERSION: 1.70.0
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
 
       - name: Install MSRV toolchain
         uses: actions-rs/toolchain@v1
@@ -100,37 +127,8 @@ jobs:
       - name: check if README matches MSRV defined here
         run: grep $MSRV_VERSION README.md
 
-      - name: pin dependency versions for MSRV
-        run: |
-          cargo update -p indexmap --precise 1.8.2
-
       - name: Run tests
         uses: actions-rs/cargo@v1
         with:
           command: test
           args: --all --no-fail-fast
-
-  Coverage:
-    needs: Formatting
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Install nightly toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: nightly
-          override: true
-
-      - name: Install and run cargo-tarpaulin
-        uses: actions-rs/tarpaulin@v0.1
-        with:
-          version: "0.26.0"
-          args: "--workspace --all-features --run-types Tests,Doctests --out Lcov --timeout 300"
-
-      - name: Upload coverage
-        uses: coverallsapp/github-action@v1
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ./lcov.info
diff --git a/.gitignore b/.gitignore
index 3038700..1dc7204 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,78 @@ bench/random-bench.csv
 bench/random-cov-bench.csv
 bench/*.bed
 data/
+
+# idea
+.idea/
+
+# Python binding ignore
+# Byte-compiled / optimized / DLL files
+__pycache__/
+.pytest_cache/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+.venv/
+env/
+bin/
+build/
+develop-eggs/
+dist/
+eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+include/
+man/
+venv/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+pip-selfcheck.json
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.cache
+nosetests.xml
+coverage.xml
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Rope
+.ropeproject
+
+# Django stuff:
+*.log
+*.pot
+
+.DS_Store
+
+# Sphinx documentation
+docs/_build/
+
+# PyCharm
+.idea/
+
+# VSCode
+.vscode/
+
+# Pyenv
+.python-version
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bd60306..da146d1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v4.5.0
     hooks:
       - id: check-yaml
         stages: [commit]
@@ -14,15 +14,22 @@ repos:
         stages: [commit]
       - id: detect-private-key
         stages: [commit]
-
-  - repo: https://github.com/crate-ci/committed
-    rev: v1.0.18
-    hooks:
-      - id: committed
-        stages: [commit-msg]
+      - id: check-added-large-files
+        args: ["--maxkb=150000"]
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
 
   - repo: https://github.com/doublify/pre-commit-rust
     rev: v1.0
     hooks:
       - id: fmt
       - id: cargo-check
+
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: "v0.1.5"
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix, --unsafe-fixes]
+        files: ^py-coitrees/
+      - id: ruff-format
+        files: ^py-coitrees/
diff --git a/README.md b/README.md
index 11205a0..8126a37 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-
 # COITrees: Cache Oblivious Interval Trees
 
 COITrees implements a data structure for very fast overlap queries of a
@@ -24,15 +23,17 @@ variants are implemented to exploit AVX2 instructions on x86-64 cpus
 type is oppurtunistically defined to one of these types if the right instruction
 set is detected. Typically it's necessary to compile with the environment
 variable `RUSTFLAGS="-Ctarget-cpu=native"` set for this to work. The fallback
-implemntation (`BasicCOITree`) supports any platform rust compiles to and
+implementation (`BasicCOITree`) supports any platform rust compiles to and
 remains highly efficient.
 
 # Trying Out
 
+The Minimum Supported Rust Version (MSRV) is 1.70.0.
 This is primary a library for use in other programs, but for benchmarking
 purposes it includes a program for intersecting BED files.
 
 To try out, just clone this repo and run:
+
 ```shell
 cargo run --release --example bed-intersect -- test1.bed test2.bed > intersections.bed
 ```
@@ -45,51 +46,50 @@ million lines of `B`.
 
 ## Intervals in sorted order
 
-|                                     |     A vs B |     B vs A |  A vs A  | B' vs B'   |
-| ----------------------------------- | ---------: | ---------: | -------: | ---------: |
-| coitrees AVX                        |      11.8s |   **3.7s** |      0.7 |      5.3s  |
-| coitrees AVX (`--sorted`)           |       6.4s |       4.2s | **0.6s** |  **0.5s**  |
-| coitrees                            |      11.4s |       5.2s |     0.8s |      8.3s  |
-| coitrees (`--sorted`)               |   **5.8s** |       5.4s | **0.6s** |  **0.5s**  |
-| cgranges (`bedcov-cr -c`)           |      35.4s |       6.6s |     2.0s |     17.6s  |
-| AIList                              |      13.8s |      10.1s |     1.1s |     18.4s  |
-| CITree                              |      20.1s |      13.5s |     1.6s |     45.7s  |
-| NCList                              |      22.5s |      16.8s |     1.9s |     39.8s  |
-| AITree                              |      23.8s |      26.3s |     2.1s |     63.4s  |
-| `bedtools coverage -counts -sorted` |     257.5s |     295.6s |    71.6s |   2130.9s  |
-| `bedtools coverage -counts`         |     322.4s |     378.5s |    75.0s |   3595.9s  |
+|                                     |   A vs B |   B vs A |   A vs A | B' vs B' |
+| ----------------------------------- | -------: | -------: | -------: | -------: |
+| coitrees AVX                        |    11.8s | **3.7s** |      0.7 |     5.3s |
+| coitrees AVX (`--sorted`)           |     6.4s |     4.2s | **0.6s** | **0.5s** |
+| coitrees                            |    11.4s |     5.2s |     0.8s |     8.3s |
+| coitrees (`--sorted`)               | **5.8s** |     5.4s | **0.6s** | **0.5s** |
+| cgranges (`bedcov-cr -c`)           |    35.4s |     6.6s |     2.0s |    17.6s |
+| AIList                              |    13.8s |    10.1s |     1.1s |    18.4s |
+| CITree                              |    20.1s |    13.5s |     1.6s |    45.7s |
+| NCList                              |    22.5s |    16.8s |     1.9s |    39.8s |
+| AITree                              |    23.8s |    26.3s |     2.1s |    63.4s |
+| `bedtools coverage -counts -sorted` |   257.5s |   295.6s |    71.6s |  2130.9s |
+| `bedtools coverage -counts`         |   322.4s |   378.5s |    75.0s |  3595.9s |
 
 ### With coverage
 
-|                                     |     A vs B |     B vs A |  A vs A  | B' vs B'   |
-| ----------------------------------- | ---------: | ---------: | -------: | ---------: |
-| coitrees AVX                        |      18.2s |   **4.8s** |     1.1s |      16.0s |
-| coitrees                            |  **14.6s** |       5.7s | **1.0s** |  **12.0s** |
-| cgranges                            |      38.4s |       8.1s |     2.2s |     31.0s  |
-| CITree                              |      23.2s |      25.6s |     2.0s |    160.4s  |
+|              |    A vs B |   B vs A |   A vs A |  B' vs B' |
+| ------------ | --------: | -------: | -------: | --------: |
+| coitrees AVX |     18.2s | **4.8s** |     1.1s |     16.0s |
+| coitrees     | **14.6s** |     5.7s | **1.0s** | **12.0s** |
+| cgranges     |     38.4s |     8.1s |     2.2s |     31.0s |
+| CITree       |     23.2s |    25.6s |     2.0s |    160.4s |
 
 ## Intervals in randomized order
 
-|                                     |     A vs B |     B vs A | A vs A   | B' vs B'  |
-| ----------------------------------- | ---------: | ---------: | -------: | --------: |
-| coitrees AVX                        |  **23.9s** |   **7.2s** | **1.6s** |  **6.1s** |
-| coitrees                            |      24.2s |       8.9s |     1.9s |      9.4s |
-| cgranges (`bedcov-cr -c`)           |      55.7s |      11.1s |     3.3s |     19.6s |
-| AIList                              |      31.2s |      18.2s |     2.3s |     19.3s |
-| CITree                              |      39.4s |      19.0s |     2.9s |     47.1s |
-| NCList                              |      42.7s |      23.8s |     3.4s |     44.0s |
-| AITree                              |     225.3s |     134.8s |    14.7s |    921.6s |
-| `bedtools coverage -counts`         |    1160.4s |     849.6s |   104.5s |   9254.6s |
+|                             |    A vs B |   B vs A |   A vs A | B' vs B' |
+| --------------------------- | --------: | -------: | -------: | -------: |
+| coitrees AVX                | **23.9s** | **7.2s** | **1.6s** | **6.1s** |
+| coitrees                    |     24.2s |     8.9s |     1.9s |     9.4s |
+| cgranges (`bedcov-cr -c`)   |     55.7s |    11.1s |     3.3s |    19.6s |
+| AIList                      |     31.2s |    18.2s |     2.3s |    19.3s |
+| CITree                      |     39.4s |    19.0s |     2.9s |    47.1s |
+| NCList                      |     42.7s |    23.8s |     3.4s |    44.0s |
+| AITree                      |    225.3s |   134.8s |    14.7s |   921.6s |
+| `bedtools coverage -counts` |   1160.4s |   849.6s |   104.5s |  9254.6s |
 
 ### With coverage
 
-|                                     |     A vs B |     B vs A |  A vs A  | B' vs B'   |
-| ----------------------------------- | ---------: | ---------: | -------: | ---------: |
-| coitrees AVX                        |      34.3s |   **8.8s** | **2.2s** |     16.3s  |
-| coitrees                            |  **29.6s** |       9.7s |     2.3s | **13.1s**  |
-| cgranges                            |      57.6s |      12.5s |     3.6s |     32.6s  |
-| CITree                              |      50.0s |      32.5s |     3.8s |    170.4s  |
-
+|              |    A vs B |   B vs A |   A vs A |  B' vs B' |
+| ------------ | --------: | -------: | -------: | --------: |
+| coitrees AVX |     34.3s | **8.8s** | **2.2s** |     16.3s |
+| coitrees     | **29.6s** |     9.7s |     2.3s | **13.1s** |
+| cgranges     |     57.6s |    12.5s |     3.6s |     32.6s |
+| CITree       |     50.0s |    32.5s |     3.8s |    170.4s |
 
 All benchmarks run on a ryzen 5950x.
 
diff --git a/bench/CITree b/bench/CITree
index 27171b1..e19ce28 100755
--- a/bench/CITree
+++ b/bench/CITree
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ~/src/cgranges/test/bedcov-itree-nocov $1 $2
-
diff --git a/bench/CITree-cov b/bench/CITree-cov
index 56587ee..69bd6dd 100755
--- a/bench/CITree-cov
+++ b/bench/CITree-cov
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ~/src/cgranges/test/bedcov-itree $1 $2
-
diff --git a/bench/bedtools b/bench/bedtools
index 8f525ab..d48b2ca 100755
--- a/bench/bedtools
+++ b/bench/bedtools
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 bedtools coverage -counts -a $1 -b $2
-
diff --git a/bench/bedtools-sorted b/bench/bedtools-sorted
index f8abfc4..d3e31b4 100755
--- a/bench/bedtools-sorted
+++ b/bench/bedtools-sorted
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 bedtools coverage -counts -sorted -a $1 -b $2
-
diff --git a/bench/cgranges b/bench/cgranges
index 3200914..4134f76 100755
--- a/bench/cgranges
+++ b/bench/cgranges
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ~/src/cgranges/test/bedcov-cr -c $1 $2
-
diff --git a/bench/cgranges-cov b/bench/cgranges-cov
index 36d8a66..d78d2f0 100755
--- a/bench/cgranges-cov
+++ b/bench/cgranges-cov
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ~/src/cgranges/test/bedcov-cr $1 $2
-
diff --git a/bench/coitrees b/bench/coitrees
index b2a4ee6..d20870c 100755
--- a/bench/coitrees
+++ b/bench/coitrees
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ../target/release/examples/bed-intersect $1 $2
-
diff --git a/bench/coitrees-cov b/bench/coitrees-cov
index 640661f..36dfd53 100755
--- a/bench/coitrees-cov
+++ b/bench/coitrees-cov
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ../target/release/examples/bed-intersect --coverage $1 $2
-
diff --git a/bench/coitrees-sorted b/bench/coitrees-sorted
index 01937ab..77e2628 100755
--- a/bench/coitrees-sorted
+++ b/bench/coitrees-sorted
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ../target/release/examples/bed-intersect --sorted $1 $2
-
diff --git a/bench/coitrees-tvt b/bench/coitrees-tvt
index 24105f4..c736e27 100755
--- a/bench/coitrees-tvt
+++ b/bench/coitrees-tvt
@@ -1,4 +1,3 @@
 #!/bin/sh
 
 ../target/release/examples/bed-intersect --tree-vs-tree $1 $2
-
diff --git a/py-coitrees/Cargo.toml b/py-coitrees/Cargo.toml
new file mode 100644
index 0000000..7a44e5a
--- /dev/null
+++ b/py-coitrees/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "py-coitrees"
+version = "0.3.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "coitrees"
+crate-type = ["cdylib"]
+
+[dependencies]
+pyo3 = { version = "0.20.0", features = ["abi3-py38", "extension-module"] }
+coitrees = { path = ".." }
diff --git a/py-coitrees/LICENSE b/py-coitrees/LICENSE
new file mode 100644
index 0000000..4f88f81
--- /dev/null
+++ b/py-coitrees/LICENSE
@@ -0,0 +1 @@
+../LICENSE
diff --git a/py-coitrees/Makefile b/py-coitrees/Makefile
new file mode 100644
index 0000000..23deef8
--- /dev/null
+++ b/py-coitrees/Makefile
@@ -0,0 +1,70 @@
+SHELL := /bin/bash
+
+ts := $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+.PHONY: help
+help: ## This help message
+	@echo -e "$$(grep -hE '^\S+:.*##' $(MAKEFILE_LIST) | sed -e 's/:.*##\s*/:/' -e 's/^\(.\+\):\(.*\)/\\x1b[36m\1\\x1b[m:\2/' | column -c2 -t -s :)"
+
+.PHONY: build
+build: dev-packages ## Builds Rust code and Python modules
+	maturin build
+
+.PHONY: build-release
+build-release: dev-packages ## Build module in release mode
+	maturin build --release
+
+.PHONY: nightly
+nightly: ## Set rust compiler to nightly version
+	rustup override set nightly
+
+.PHONY: install
+install: dev-packages ## Install module into current virtualenv
+	maturin develop --release
+
+.PHONY: publish
+publish: ## Publish crate on Pypi
+	poetry run maturin publish
+
+.PHONY: clean
+clean: ## Clean up build artifacts
+	cargo clean
+	find .  \( -type f -name "*.py[co]" -o -type d -name "__pycache__" \) -delete && echo "Removed pycs and __pycache__"
+	rm -f data/*log
+
+.PHONY: dev-packages
+dev-packages: ## Install Python development packages for project
+	poetry install
+
+.PHONY: cargo-test
+cargo-test: ## Run cargo tests only
+	cargo test
+
+.PHONY: test
+test: cargo-test dev-packages install quicktest ## Install rscannls module and run tests
+
+.PHONY: quicktest
+quicktest: ## Run tests on already installed hyperjson module
+	poetry run pytest tests
+
+.PHONY: bench
+bench: ## Run benchmarks
+	poetry run pytest benchmarks
+
+.PHONY: bench-compare
+bench-compare: nightly dev-packages install ## Run benchmarks and compare results with other JSON encoders
+	poetry run pytest benchmarks --compare
+
+.PHONY: build-profile
+build-profile: ## Builds binary for profiling
+	cd profiling && poetry run cargo build --release
+
+# Setup instructions here:
+# https://gist.github.com/dlaehnemann/df31787c41bd50c0fe223df07cf6eb89
+.PHONY: profile
+profile: OUTPUT_PATH = measurements/flame-$(ts).svg
+profile: FLAGS=booleans --iterations 10000
+profile: nightly build-profile ## Run perf-based profiling (only works on Linux!)
+	perf record --call-graph dwarf,16384 -e cpu-clock -F 997 target/release/profiling $(FLAGS)
+	time perf script | stackcollapse-perf.pl | c++filt | flamegraph.pl > $(OUTPUT_PATH)
+	@echo "$(OUTPUT_PATH)"
diff --git a/py-coitrees/README.md b/py-coitrees/README.md
new file mode 100644
index 0000000..94389ae
--- /dev/null
+++ b/py-coitrees/README.md
@@ -0,0 +1 @@
+../README.md
diff --git a/py-coitrees/coitrees/__init__.py b/py-coitrees/coitrees/__init__.py
new file mode 100644
index 0000000..b607082
--- /dev/null
+++ b/py-coitrees/coitrees/__init__.py
@@ -0,0 +1,7 @@
+"""coitrees package."""
+from .coitrees import sum_as_string
+
+
+def sum_as_string_add_2(a, b):
+    """Add 2 to the result of sum_as_string."""
+    return sum_as_string(a, b) + "2"
diff --git a/py-coitrees/coitrees/__main___.py b/py-coitrees/coitrees/__main___.py
new file mode 100644
index 0000000..e69de29
diff --git a/py-coitrees/coitrees/coitrees.py b/py-coitrees/coitrees/coitrees.py
new file mode 100644
index 0000000..ae2a29a
--- /dev/null
+++ b/py-coitrees/coitrees/coitrees.py
@@ -0,0 +1,44 @@
+class Interval:
+    """Interval class for Coitree."""
+
+    def __init__(self, low, high):
+        """Initialize interval."""
+        self.low = low
+        self.high = high
+
+
+class CoitreeNode:
+    """Coitree node class."""
+
+    def __init__(self, interval, data):
+        """Initialize node."""
+        self.key = interval
+        self.data = data
+
+
+class Coitree:
+    """Coitree class."""
+
+    def __init__(self):
+        """Initialize Coitree."""
+        raise NotImplementedError
+
+    def insert(self, node):
+        raise NotImplementedError
+
+    def delete(self, key):
+        raise NotImplementedError
+
+    def search(self, key):
+        raise NotImplementedError
+
+    def build(self, node_list):
+        raise NotImplementedError
+
+    def find_overlap(self, key):
+        raise NotImplementedError
+
+    def __repr__(self) -> str:
+        raise NotImplementedError
+
+    __str__ = __repr__
diff --git a/py-coitrees/coitrees/py.typed b/py-coitrees/coitrees/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/py-coitrees/poetry.lock b/py-coitrees/poetry.lock
new file mode 100644
index 0000000..1dec902
--- /dev/null
+++ b/py-coitrees/poetry.lock
@@ -0,0 +1,473 @@
+# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand.
+
+[[package]]
+name = "appnope"
+version = "0.1.3"
+description = "Disable App Nap on macOS >= 10.9"
+optional = false
+python-versions = "*"
+files = [
+    {file = "appnope-0.1.3-py2.py3-none-any.whl", hash = "sha256:265a455292d0bd8a72453494fa24df5a11eb18373a60c7c0430889f22548605e"},
+    {file = "appnope-0.1.3.tar.gz", hash = "sha256:02bd91c4de869fbb1e1c50aafc4098827a7a54ab2f39d9dcba6c9547ed920e24"},
+]
+
+[[package]]
+name = "asttokens"
+version = "2.4.1"
+description = "Annotate AST trees with source code positions"
+optional = false
+python-versions = "*"
+files = [
+    {file = "asttokens-2.4.1-py2.py3-none-any.whl", hash = "sha256:051ed49c3dcae8913ea7cd08e46a606dba30b79993209636c4875bc1d637bc24"},
+    {file = "asttokens-2.4.1.tar.gz", hash = "sha256:b03869718ba9a6eb027e134bfdf69f38a236d681c83c160d510768af11254ba0"},
+]
+
+[package.dependencies]
+six = ">=1.12.0"
+
+[package.extras]
+astroid = ["astroid (>=1,<2)", "astroid (>=2,<4)"]
+test = ["astroid (>=1,<2)", "astroid (>=2,<4)", "pytest"]
+
+[[package]]
+name = "backcall"
+version = "0.2.0"
+description = "Specifications for callback functions passed in to an API"
+optional = false
+python-versions = "*"
+files = [
+    {file = "backcall-0.2.0-py2.py3-none-any.whl", hash = "sha256:fbbce6a29f263178a1f7915c1940bde0ec2b2a967566fe1c65c1dfb7422bd255"},
+    {file = "backcall-0.2.0.tar.gz", hash = "sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e"},
+]
+
+[[package]]
+name = "colorama"
+version = "0.4.6"
+description = "Cross-platform colored terminal text."
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+files = [
+    {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
+    {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
+]
+
+[[package]]
+name = "decorator"
+version = "5.1.1"
+description = "Decorators for Humans"
+optional = false
+python-versions = ">=3.5"
+files = [
+    {file = "decorator-5.1.1-py3-none-any.whl", hash = "sha256:b8c3f85900b9dc423225913c5aace94729fe1fa9763b38939a95226f02d37186"},
+    {file = "decorator-5.1.1.tar.gz", hash = "sha256:637996211036b6385ef91435e4fae22989472f9d571faba8927ba8253acbc330"},
+]
+
+[[package]]
+name = "exceptiongroup"
+version = "1.1.3"
+description = "Backport of PEP 654 (exception groups)"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "exceptiongroup-1.1.3-py3-none-any.whl", hash = "sha256:343280667a4585d195ca1cf9cef84a4e178c4b6cf2274caef9859782b567d5e3"},
+    {file = "exceptiongroup-1.1.3.tar.gz", hash = "sha256:097acd85d473d75af5bb98e41b61ff7fe35efe6675e4f9370ec6ec5126d160e9"},
+]
+
+[package.extras]
+test = ["pytest (>=6)"]
+
+[[package]]
+name = "executing"
+version = "2.0.0"
+description = "Get the currently executing AST node of a frame, and other information"
+optional = false
+python-versions = "*"
+files = [
+    {file = "executing-2.0.0-py2.py3-none-any.whl", hash = "sha256:06df6183df67389625f4e763921c6cf978944721abf3e714000200aab95b0657"},
+    {file = "executing-2.0.0.tar.gz", hash = "sha256:0ff053696fdeef426cda5bd18eacd94f82c91f49823a2e9090124212ceea9b08"},
+]
+
+[package.extras]
+tests = ["asttokens (>=2.1.0)", "coverage", "coverage-enable-subprocess", "ipython", "littleutils", "pytest", "rich"]
+
+[[package]]
+name = "iniconfig"
+version = "2.0.0"
+description = "brain-dead simple config-ini parsing"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"},
+    {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
+]
+
+[[package]]
+name = "ipdb"
+version = "0.13.13"
+description = "IPython-enabled pdb"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+files = [
+    {file = "ipdb-0.13.13-py3-none-any.whl", hash = "sha256:45529994741c4ab6d2388bfa5d7b725c2cf7fe9deffabdb8a6113aa5ed449ed4"},
+    {file = "ipdb-0.13.13.tar.gz", hash = "sha256:e3ac6018ef05126d442af680aad863006ec19d02290561ac88b8b1c0b0cfc726"},
+]
+
+[package.dependencies]
+decorator = {version = "*", markers = "python_version > \"3.6\""}
+ipython = {version = ">=7.31.1", markers = "python_version > \"3.6\""}
+tomli = {version = "*", markers = "python_version > \"3.6\" and python_version < \"3.11\""}
+
+[[package]]
+name = "ipython"
+version = "8.12.3"
+description = "IPython: Productive Interactive Computing"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "ipython-8.12.3-py3-none-any.whl", hash = "sha256:b0340d46a933d27c657b211a329d0be23793c36595acf9e6ef4164bc01a1804c"},
+    {file = "ipython-8.12.3.tar.gz", hash = "sha256:3910c4b54543c2ad73d06579aa771041b7d5707b033bd488669b4cf544e3b363"},
+]
+
+[package.dependencies]
+appnope = {version = "*", markers = "sys_platform == \"darwin\""}
+backcall = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+decorator = "*"
+jedi = ">=0.16"
+matplotlib-inline = "*"
+pexpect = {version = ">4.3", markers = "sys_platform != \"win32\""}
+pickleshare = "*"
+prompt-toolkit = ">=3.0.30,<3.0.37 || >3.0.37,<3.1.0"
+pygments = ">=2.4.0"
+stack-data = "*"
+traitlets = ">=5"
+typing-extensions = {version = "*", markers = "python_version < \"3.10\""}
+
+[package.extras]
+all = ["black", "curio", "docrepr", "ipykernel", "ipyparallel", "ipywidgets", "matplotlib", "matplotlib (!=3.2.0)", "nbconvert", "nbformat", "notebook", "numpy (>=1.21)", "pandas", "pytest (<7)", "pytest (<7.1)", "pytest-asyncio", "qtconsole", "setuptools (>=18.5)", "sphinx (>=1.3)", "sphinx-rtd-theme", "stack-data", "testpath", "trio", "typing-extensions"]
+black = ["black"]
+doc = ["docrepr", "ipykernel", "matplotlib", "pytest (<7)", "pytest (<7.1)", "pytest-asyncio", "setuptools (>=18.5)", "sphinx (>=1.3)", "sphinx-rtd-theme", "stack-data", "testpath", "typing-extensions"]
+kernel = ["ipykernel"]
+nbconvert = ["nbconvert"]
+nbformat = ["nbformat"]
+notebook = ["ipywidgets", "notebook"]
+parallel = ["ipyparallel"]
+qtconsole = ["qtconsole"]
+test = ["pytest (<7.1)", "pytest-asyncio", "testpath"]
+test-extra = ["curio", "matplotlib (!=3.2.0)", "nbformat", "numpy (>=1.21)", "pandas", "pytest (<7.1)", "pytest-asyncio", "testpath", "trio"]
+
+[[package]]
+name = "jedi"
+version = "0.19.1"
+description = "An autocompletion tool for Python that can be used for text editors."
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "jedi-0.19.1-py2.py3-none-any.whl", hash = "sha256:e983c654fe5c02867aef4cdfce5a2fbb4a50adc0af145f70504238f18ef5e7e0"},
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+[package.dependencies]
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+[package.extras]
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+qa = ["flake8 (==5.0.4)", "mypy (==0.971)", "types-setuptools (==67.2.0.1)"]
+testing = ["Django", "attrs", "colorama", "docopt", "pytest (<7.0.0)"]
+
+[[package]]
+name = "matplotlib-inline"
+version = "0.1.6"
+description = "Inline Matplotlib backend for Jupyter"
+optional = false
+python-versions = ">=3.5"
+files = [
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+[package.dependencies]
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+
+[[package]]
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+version = "23.2"
+description = "Core utilities for Python packages"
+optional = false
+python-versions = ">=3.7"
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+
+[[package]]
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+version = "3.0.39"
+description = "Library for building powerful interactive command lines in Python"
+optional = false
+python-versions = ">=3.7.0"
+files = [
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+
+[[package]]
+name = "pure-eval"
+version = "0.2.2"
+description = "Safely evaluate AST nodes without side effects"
+optional = false
+python-versions = "*"
+files = [
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+[package.extras]
+tests = ["pytest"]
+
+[[package]]
+name = "pygments"
+version = "2.16.1"
+description = "Pygments is a syntax highlighting package written in Python."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "Pygments-2.16.1-py3-none-any.whl", hash = "sha256:13fc09fa63bc8d8671a6d247e1eb303c4b343eaee81d861f3404db2935653692"},
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+]
+
+[package.extras]
+plugins = ["importlib-metadata"]
+
+[[package]]
+name = "pytest"
+version = "7.4.3"
+description = "pytest: simple powerful testing with Python"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-7.4.3-py3-none-any.whl", hash = "sha256:0d009c083ea859a71b76adf7c1d502e4bc170b80a8ef002da5806527b9591fac"},
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+[package.dependencies]
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<2.0"
+tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
+
+[package.extras]
+testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
+
+[[package]]
+name = "pytest-sugar"
+version = "0.9.7"
+description = "pytest-sugar is a plugin for pytest that changes the default look and feel of pytest (e.g. progressbar, show tests that fail instantly)."
+optional = false
+python-versions = "*"
+files = [
+    {file = "pytest-sugar-0.9.7.tar.gz", hash = "sha256:f1e74c1abfa55f7241cf7088032b6e378566f16b938f3f08905e2cf4494edd46"},
+    {file = "pytest_sugar-0.9.7-py2.py3-none-any.whl", hash = "sha256:8cb5a4e5f8bbcd834622b0235db9e50432f4cbd71fef55b467fe44e43701e062"},
+]
+
+[package.dependencies]
+packaging = ">=21.3"
+pytest = ">=6.2.0"
+termcolor = ">=2.1.0"
+
+[package.extras]
+dev = ["black", "flake8", "pre-commit"]
+
+[[package]]
+name = "ruff"
+version = "0.1.3"
+description = "An extremely fast Python linter, written in Rust."
+optional = false
+python-versions = ">=3.7"
+files = [
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+    {file = "ruff-0.1.3-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:0b6c55f5ef8d9dd05b230bb6ab80bc4381ecb60ae56db0330f660ea240cb0d4a"},
+    {file = "ruff-0.1.3-py3-none-win32.whl", hash = "sha256:3e7afcbdcfbe3399c34e0f6370c30f6e529193c731b885316c5a09c9e4317eef"},
+    {file = "ruff-0.1.3-py3-none-win_amd64.whl", hash = "sha256:7a18df6638cec4a5bd75350639b2bb2a2366e01222825562c7346674bdceb7ea"},
+    {file = "ruff-0.1.3-py3-none-win_arm64.whl", hash = "sha256:12fd53696c83a194a2db7f9a46337ce06445fb9aa7d25ea6f293cf75b21aca9f"},
+    {file = "ruff-0.1.3.tar.gz", hash = "sha256:3ba6145369a151401d5db79f0a47d50e470384d0d89d0d6f7fab0b589ad07c34"},
+]
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+files = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+
+[[package]]
+name = "stack-data"
+version = "0.6.3"
+description = "Extract data from python stack frames and tracebacks for informative displays"
+optional = false
+python-versions = "*"
+files = [
+    {file = "stack_data-0.6.3-py3-none-any.whl", hash = "sha256:d5558e0c25a4cb0853cddad3d77da9891a08cb85dd9f9f91b9f8cd66e511e695"},
+    {file = "stack_data-0.6.3.tar.gz", hash = "sha256:836a778de4fec4dcd1dcd89ed8abff8a221f58308462e1c4aa2a3cf30148f0b9"},
+]
+
+[package.dependencies]
+asttokens = ">=2.1.0"
+executing = ">=1.2.0"
+pure-eval = "*"
+
+[package.extras]
+tests = ["cython", "littleutils", "pygments", "pytest", "typeguard"]
+
+[[package]]
+name = "termcolor"
+version = "2.3.0"
+description = "ANSI color formatting for output in terminal"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "termcolor-2.3.0-py3-none-any.whl", hash = "sha256:3afb05607b89aed0ffe25202399ee0867ad4d3cb4180d98aaf8eefa6a5f7d475"},
+    {file = "termcolor-2.3.0.tar.gz", hash = "sha256:b5b08f68937f138fe92f6c089b99f1e2da0ae56c52b78bf7075fd95420fd9a5a"},
+]
+
+[package.extras]
+tests = ["pytest", "pytest-cov"]
+
+[[package]]
+name = "tomli"
+version = "2.0.1"
+description = "A lil' TOML parser"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
+    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
+]
+
+[[package]]
+name = "traitlets"
+version = "5.12.0"
+description = "Traitlets Python configuration system"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "traitlets-5.12.0-py3-none-any.whl", hash = "sha256:81539f07f7aebcde2e4b5ab76727f53eabf18ad155c6ed7979a681411602fa47"},
+    {file = "traitlets-5.12.0.tar.gz", hash = "sha256:833273bf645d8ce31dcb613c56999e2e055b1ffe6d09168a164bcd91c36d5d35"},
+]
+
+[package.extras]
+docs = ["myst-parser", "pydata-sphinx-theme", "sphinx"]
+test = ["argcomplete (>=3.0.3)", "mypy (>=1.6.0)", "pre-commit", "pytest (>=7.0,<7.5)", "pytest-mock", "pytest-mypy-testing"]
+
+[[package]]
+name = "typing-extensions"
+version = "4.8.0"
+description = "Backported and Experimental Type Hints for Python 3.8+"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "typing_extensions-4.8.0-py3-none-any.whl", hash = "sha256:8f92fc8806f9a6b641eaa5318da32b44d401efaac0f6678c9bc448ba3605faa0"},
+    {file = "typing_extensions-4.8.0.tar.gz", hash = "sha256:df8e4339e9cb77357558cbdbceca33c303714cf861d1eef15e1070055ae8b7ef"},
+]
+
+[[package]]
+name = "wcwidth"
+version = "0.2.8"
+description = "Measures the displayed width of unicode strings in a terminal"
+optional = false
+python-versions = "*"
+files = [
+    {file = "wcwidth-0.2.8-py2.py3-none-any.whl", hash = "sha256:77f719e01648ed600dfa5402c347481c0992263b81a027344f3e1ba25493a704"},
+    {file = "wcwidth-0.2.8.tar.gz", hash = "sha256:8705c569999ffbb4f6a87c6d1b80f324bd6db952f5eb0b95bc07517f4c1813d4"},
+]
+
+[metadata]
+lock-version = "2.0"
+python-versions = "^3.8"
+content-hash = "3221317cd8d9477e81c0470dd8c2e965b2a6e42ec12030eb72054650a18a9cd9"
diff --git a/py-coitrees/pyproject.toml b/py-coitrees/pyproject.toml
new file mode 100644
index 0000000..6919ff3
--- /dev/null
+++ b/py-coitrees/pyproject.toml
@@ -0,0 +1,228 @@
+[build-system]
+requires = ["maturin>=1.2.1,<2"]
+build-backend = "maturin"
+
+
+[tool.poetry]
+name = "coitrees"
+version = "0.3.0"
+description = "Blazingly fast interval tree library"
+authors = [
+    "Yangyang Li <yangyang.li@northwestern.edu>",
+    "Daniel C. Jones <djones3@fredhutch.org>",
+]
+
+[project]
+name = "coitrees"
+description = "Blazingly fast interval tree library"
+authors = [
+    { name = "Yangyang Li", email = "yangyang.li@northwestern.edu" },
+    { name = "Daniel C. Jones", email = "djones3@fredhutch.org" },
+]
+readme = "README.md"
+requires-python = ">=3.8"
+license = { file = "LICENSE" }
+keywords = ["interval tree", "find overlap", "rust", "blazingly fast"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Rust",
+    "Topic :: Scientific/Engineering",
+]
+
+
+[tool.poetry.dependencies]
+python = "^3.8"
+
+[tool.poetry.group.dev.dependencies]
+pytest-sugar = "^0.9.7"
+pytest = "^7.4.3"
+ruff = "^0.1.3"
+ipdb = "^0.13.13"
+
+
+[project.urls]
+homepage = "https://github.com/dcjones/coitrees"
+documentation = "https://github.com/dcjones/coitrees"
+repository = "https://github.com/dcjones/coitrees"
+changelog = "https://github.com/dcjones/coitrees/README.md"
+
+[tool.ruff]
+target-version = "py38"
+line-length = 120
+fix = true
+fixable = ["ALL"]
+select = [
+    "ANN",
+    "D",
+    "A",
+    "F",
+    "E",
+    "W",
+    "C90",
+    "I",
+    "UP",
+    "N",
+    "YTT",
+    "TID",
+    "S",
+    "BLE",
+    "FBT",
+    "PLR",
+    "B",
+    "B9",
+    "A",
+    "C4",
+    "T10",
+    "EM",
+    "ICN",
+    "T20",
+    "Q",
+    "RET",
+    "SIM",
+    "ARG",
+    "DTZ",
+    "ERA",
+    "PD",
+    "PGH",
+    "PLC",
+    "PLE",
+    "PLW",
+    "RUF",
+    "PL",
+    "TD",
+    "FIX",
+    "PTH",
+    "TCH",
+    "SLOT",
+    "PT",
+    "PYI",
+    "PIE",
+    "ISC",
+    "FA",
+    "EXE",
+    # "CPY",
+    "COM",
+]
+ignore = [
+    "E501",
+    "D203",
+    "D100",
+    "D401",
+    "ANN101",
+    "ANN102",
+    "ANN001",
+    "ANN002",
+    "ANN003",
+    "ANN201",
+    "ANN202",
+    "ANN204",
+    "ANN205",
+    "ANN206",
+    "PGH003",
+    "N802",
+    "N803",
+    "N806",
+    "N815",
+    "EM101",
+    # formater conflict
+    'COM812',
+    'COM819',
+    'D206',
+    'ISC001',
+    'Q000',
+    'Q001',
+    'Q002',
+    'Q003',
+    'W191',
+]
+exclude = [
+    "tests/*",
+    "scripts/*",
+    "docs/conf.py",
+
+    ".bzr",
+    ".direnv",
+    ".eggs",
+    ".git",
+    ".git-rewrite",
+    ".hg",
+    ".mypy_cache",
+    ".nox",
+    ".pants.d",
+    ".pytype",
+    ".ruff_cache",
+    ".svn",
+    ".tox",
+    ".venv",
+    "__pypackages__",
+    "_build",
+    "buck-out",
+    "build",
+    "dist",
+    "node_modules",
+    "venv",
+
+]
+
+
+[tool.ruff.format]
+# Like Black, use double quotes for strings.
+quote-style = "double"
+# Like Black, indent with spaces, rather than tabs.
+indent-style = "space"
+# Like Black, respect magic trailing commas.
+# magic-trailing-comma = "respect"
+# Like Black, automatically detect the appropriate line ending.
+line-ending = "auto"
+
+[tool.ruff.flake8-bugbear]
+extend-immutable-calls = ["typer.Argument", "typer.Option"]
+
+[tool.ruff.flake8-annotations]
+allow-star-arg-any = true
+
+[tool.ruff.per-file-ignores]
+
+[tool.ruff.pydocstyle]
+convention = 'google'
+
+[tool.coverage.paths]
+source = ["coitrees", "*/site-packages"]
+tests = ["tests", "*/tests"]
+
+[tool.coverage.run]
+branch = true
+source = ["coitrees"]
+omit = ["tests/*"]
+
+[tool.coverage.report]
+show_missing = true
+fail_under = 40
+ignore_errors = true
+
+[tool.mypy]
+strict = false
+warn_unreachable = true
+pretty = true
+show_column_numbers = true
+show_error_codes = true
+show_error_context = true
+ignore_missing_imports = true
+
+[tool.pytest.ini_options]
+markers = [
+    "smoke: a quick smoke test",
+    "failing: failing tests",
+    "imports: importing tests",
+]
diff --git a/py-coitrees/src/lib.rs b/py-coitrees/src/lib.rs
new file mode 100644
index 0000000..8ba564b
--- /dev/null
+++ b/py-coitrees/src/lib.rs
@@ -0,0 +1,15 @@
+use pyo3::prelude::*;
+
+/// Formats the sum of two numbers as string.
+#[pyfunction]
+fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    println!("hello world from rust");
+    Ok((a + b).to_string())
+}
+
+/// A Python module implemented in Rust.
+#[pymodule]
+fn coitrees(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}
diff --git a/py-coitrees/tests/.gitkeep b/py-coitrees/tests/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/py-coitrees/tests/test_coitrees.py b/py-coitrees/tests/test_coitrees.py
new file mode 100644
index 0000000..a73e7aa
--- /dev/null
+++ b/py-coitrees/tests/test_coitrees.py
@@ -0,0 +1,6 @@
+from coitrees import sum_as_string_add_2
+
+def test_sum_as_string_add_2():
+    """Test sum_as_string function."""
+    result = sum_as_string_add_2(1, 2)
+    assert result == "32"
diff --git a/src/avx.rs b/src/avx.rs
index 2a2ec52..36a66c7 100644
--- a/src/avx.rs
+++ b/src/avx.rs
@@ -484,7 +484,7 @@ where
         self.nodes.is_empty()
     }
 
-    // /// Find intervals in the set overlaping the query `[first, last]` and call `visit` on every overlapping node
+    // /// Find intervals in the set overlapping the query `[first, last]` and call `visit` on every overlapping node
     fn query<F>(&'a self, first: i32, last: i32, mut visit: F)
     where
         F: FnMut(&Interval<&'a T>),
@@ -611,8 +611,8 @@ where
         let node = &self.nodes[self.i];
         if self.j < 8 {
             let ret = Some(Interval {
-                first: node.first(self.j),
-                last: node.last(self.j),
+                first: node.first(self.j) + 1,
+                last: node.last(self.j) - 1,
                 metadata: &node.metadata[self.j],
             });
             self.count += 1;
@@ -651,8 +651,8 @@ where
         let node = &self.nodes[self.i];
         self.count += 1;
         Some(Interval {
-            first: node.first(self.j),
-            last: node.last(self.j),
+            first: node.first(self.j) + 1,
+            last: node.last(self.j) - 1,
             metadata: &node.metadata[self.j],
         })
     }
@@ -901,7 +901,7 @@ where
             return;
         }
 
-        // not overlaping or preceding
+        // not overlapping or preceding
         if first < self.prev_first || first > self.prev_last {
             // no overlap with previous query. have to resort to regular query strategy
             self.overlapping_intervals.clear();
diff --git a/src/lib.rs b/src/lib.rs
index 14d3c59..867254d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -11,7 +11,7 @@
 //! structs which store integer, end-inclusive intervals along with associated
 //! metadata. The tree can be queried directly for coverage or overlaps, or
 //! through the intermediary `SortedQuerenty` which keeps track of some state
-//! to accelerate overlaping queries.
+//! to accelerate overlapping queries.
 
 mod interval;
 pub use interval::*;
diff --git a/src/neon.rs b/src/neon.rs
index 00a5b30..3c5a072 100644
--- a/src/neon.rs
+++ b/src/neon.rs
@@ -381,7 +381,7 @@ where
         self.nodes.is_empty()
     }
 
-    // /// Find intervals in the set overlaping the query `[first, last]` and call `visit` on every overlapping node
+    // /// Find intervals in the set overlapping the query `[first, last]` and call `visit` on every overlapping node
     fn query<F>(&'a self, first: i32, last: i32, mut visit: F)
     where
         F: FnMut(&Interval<&'a T>),
@@ -508,8 +508,8 @@ where
         let node = &self.nodes[self.i];
         if self.j < LANE_SIZE {
             let ret = Some(Interval {
-                first: node.first(self.j),
-                last: node.last(self.j),
+                first: node.first(self.j) + 1,
+                last: node.last(self.j) - 1,
                 metadata: &node.metadata[self.j],
             });
             self.count += 1;
@@ -548,8 +548,8 @@ where
         let node = &self.nodes[self.i];
         self.count += 1;
         Some(Interval {
-            first: node.first(self.j),
-            last: node.last(self.j),
+            first: node.first(self.j) + 1,
+            last: node.last(self.j) - 1,
             metadata: &node.metadata[self.j],
         })
     }
@@ -798,7 +798,7 @@ where
             return;
         }
 
-        // not overlaping or preceding
+        // not overlapping or preceding
         if first < self.prev_first || first > self.prev_last {
             // no overlap with previous query. have to resort to regular query strategy
             self.overlapping_intervals.clear();
diff --git a/src/nosimd.rs b/src/nosimd.rs
index 4fe1f35..9186a77 100644
--- a/src/nosimd.rs
+++ b/src/nosimd.rs
@@ -11,7 +11,7 @@
 //! structs which store integer, end-inclusive intervals along with associated
 //! metadata. The tree can be queried directly for coverage or overlaps, or
 //! through the intermediary `SortedQuerent` which keeps track of some state
-//! to accelerate overlaping queries.
+//! to accelerate overlapping queries.
 
 use super::interval::{GenericInterval, IntWithMax, Interval, IntervalTree, SortedQuerent};
 use std::cmp::Ordering;
@@ -190,7 +190,7 @@ where
         self.nodes.is_empty()
     }
 
-    /// Find intervals in the set overlaping the query `[first, last]` and call `visit` on every overlapping node
+    /// Find intervals in the set overlapping the query `[first, last]` and call `visit` on every overlapping node
     fn query<F>(&'a self, first: i32, last: i32, mut visit: F)
     where
         F: FnMut(&IntervalNode<T, I>),
@@ -547,7 +547,7 @@ where
             return;
         }
 
-        // not overlaping or preceding
+        // not overlapping or preceding
         if first < self.prev_first || first > self.prev_last {
             // no overlap with previous query. have to resort to regular query strategy
             self.overlapping_intervals.clear();