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Replace find_module by find_spec #532

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Replace find_module by find_spec #532

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8 changes: 5 additions & 3 deletions pygal/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,8 @@
import sys
import traceback
import warnings
from importlib.abc import MetaPathFinder
from importlib.util import spec_from_loader

import pkg_resources

Expand Down Expand Up @@ -80,22 +82,22 @@
CHARTS = list(CHARTS_BY_NAME.values())


class PluginImportFixer(object):
class PluginImportFixer(MetaPathFinder):
"""
Allow external map plugins to be imported from pygal.maps package.

It is a ``sys.meta_path`` loader.
"""

def find_module(self, fullname, path=None):
def find_spec(self, fullname, path, target=None):
"""
Tell if the module to load can be loaded by
the load_module function, ie: if it is a ``pygal.maps.*``
module.
"""
if fullname.startswith('pygal.maps.') and hasattr(
maps, fullname.split('.')[2]):
return self
return spec_from_loader(fullname, self)
return None

def load_module(self, name):
Expand Down