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Improve struct iterable handling #21

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Merged
jss367 merged 1 commit into from
Nov 23, 2025
Merged

Improve struct iterable handling #21

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27 changes: 22 additions & 5 deletions src/pyxtend/struct.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
from collections.abc import Iterable
import itertools
from collections.abc import Iterable, Sized
from typing import Any, Union


Expand Down Expand Up @@ -37,12 +38,28 @@ def struct(obj: Any, level: int = 0, limit: int = 3, examples: bool = False) ->
return groupby_summary(obj)
elif isinstance(obj, Iterable) and not isinstance(obj, (str, bytes)):
if level < limit:
preview_limit = 3
iterator = iter(obj)
items = list(itertools.islice(iterator, preview_limit + 1))
truncated = len(items) > preview_limit
items = items[:preview_limit]

if examples:
inner_structure = [x for x in obj]
inner_structure = items
else:
inner_structure = [struct(x, level + 1) for x in obj]
if len(obj) > 3:
inner_structure = inner_structure[:3] + [f"...{len(obj)} total"]
inner_structure = [struct(x, level + 1, limit, examples) for x in items]

summary_entry = None
if isinstance(obj, Sized):
total = len(obj)
if total > preview_limit:
summary_entry = f"...{total} total"
elif truncated:
summary_entry = "...more"

if summary_entry:
inner_structure.append(summary_entry)

return {type(obj).__name__: inner_structure}
else:
return {type(obj).__name__: "..."}
Expand Down