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60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
"""A pure Python implementation of import.
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References on import:
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* Language reference
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http://docs.python.org/ref/import.html
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* __import__ function
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http://docs.python.org/lib/built-in-funcs.html
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* Packages
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http://www.python.org/doc/essays/packages.html
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* PEP 235: Import on Case-Insensitive Platforms
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http://www.python.org/dev/peps/pep-0235
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* PEP 275: Import Modules from Zip Archives
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http://www.python.org/dev/peps/pep-0273
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* PEP 302: New Import Hooks
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http://www.python.org/dev/peps/pep-0302/
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* PEP 328: Imports: Multi-line and Absolute/Relative
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http://www.python.org/dev/peps/pep-0328
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"""
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__all__ = ['__import__', 'import_module', 'invalidate_caches']
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from . import _bootstrap
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# To simplify imports in test code
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_w_long = _bootstrap._w_long
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_r_long = _bootstrap._r_long
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# Bootstrap help #####################################################
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import imp
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import sys
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_bootstrap._setup(sys, imp)
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# Public API #########################################################
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from ._bootstrap import __import__, invalidate_caches
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def import_module(name, package=None):
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"""Import a module.
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The 'package' argument is required when performing a relative import. It
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specifies the package to use as the anchor point from which to resolve the
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relative import to an absolute import.
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"""
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level = 0
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if name.startswith('.'):
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if not package:
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raise TypeError("relative imports require the 'package' argument")
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for character in name:
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if character != '.':
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break
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level += 1
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return _bootstrap._gcd_import(name[level:], package, level)
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