2 changed files with 39 additions and 1 deletions
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"""Backport of importlib.import_module from 3.x.""" |
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# While not critical (and in no way guaranteed!), it would be nice to keep this |
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# code compatible with Python 2.3. |
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import sys |
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|
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def _resolve_name(name, package, level): |
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"""Return the absolute name of the module to be imported.""" |
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if not hasattr(package, 'rindex'): |
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raise ValueError("'package' not set to a string") |
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dot = len(package) |
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for x in xrange(level, 1, -1): |
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try: |
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dot = package.rindex('.', 0, dot) |
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except ValueError: |
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raise ValueError("attempted relative import beyond top-level " |
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"package") |
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return "%s.%s" % (package[:dot], name) |
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|
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|
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def import_module(name, package=None): |
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"""Import a module. |
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|
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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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""" |
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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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level = 0 |
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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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name = _resolve_name(name[level:], package, level) |
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__import__(name) |
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return sys.modules[name] |
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