mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
"""A pure Python implementation of import."""
|
|
__all__ = ['__import__', 'import_module', 'invalidate_caches']
|
|
|
|
from . import _bootstrap
|
|
|
|
|
|
# To simplify imports in test code
|
|
_w_long = _bootstrap._w_long
|
|
_r_long = _bootstrap._r_long
|
|
|
|
|
|
# Bootstrap help #####################################################
|
|
import imp
|
|
import sys
|
|
|
|
_bootstrap._setup(sys, imp)
|
|
|
|
|
|
# Public API #########################################################
|
|
|
|
from ._bootstrap import __import__
|
|
|
|
|
|
def invalidate_caches():
|
|
"""Call the invalidate_caches() method on all finders stored in
|
|
sys.path_importer_caches (where implemented)."""
|
|
for finder in sys.path_importer_cache.values():
|
|
if hasattr(finder, 'invalidate_caches'):
|
|
finder.invalidate_caches()
|
|
|
|
|
|
def import_module(name, package=None):
|
|
"""Import a module.
|
|
|
|
The 'package' argument is required when performing a relative import. It
|
|
specifies the package to use as the anchor point from which to resolve the
|
|
relative import to an absolute import.
|
|
|
|
"""
|
|
level = 0
|
|
if name.startswith('.'):
|
|
if not package:
|
|
raise TypeError("relative imports require the 'package' argument")
|
|
for character in name:
|
|
if character != '.':
|
|
break
|
|
level += 1
|
|
return _bootstrap._gcd_import(name[level:], package, level)
|