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"""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)
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