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"""A pure Python implementation of import.
References on import:
* Language reference
http://docs.python.org/ref/import.html
* __import__ function
http://docs.python.org/lib/built-in-funcs.html
* Packages
http://www.python.org/doc/essays/packages.html
* PEP 235: Import on Case-Insensitive Platforms
http://www.python.org/dev/peps/pep-0235
* PEP 275: Import Modules from Zip Archives
http://www.python.org/dev/peps/pep-0273
* PEP 302: New Import Hooks
http://www.python.org/dev/peps/pep-0302/
* PEP 328: Imports: Multi-line and Absolute/Relative
http://www.python.org/dev/peps/pep-0328
"""
__all__ = ['__import__', 'import_module']
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 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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