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svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r67900 | benjamin.peterson | 2008-12-22 14:02:45 -0600 (Mon, 22 Dec 2008) | 4 lines fix_execfile: wrap the open(fn).read() call in compile(), so the filename is preserved also add unittests for the fixer ........ r67901 | benjamin.peterson | 2008-12-22 14:09:55 -0600 (Mon, 22 Dec 2008) | 1 line remove unused import ........ r67919 | benjamin.peterson | 2008-12-23 13:12:22 -0600 (Tue, 23 Dec 2008) | 1 line copy permission bits from the backup to the original ........ r67928 | benjamin.peterson | 2008-12-26 20:49:30 -0600 (Fri, 26 Dec 2008) | 1 line don't be so idiot about multiple local imports in fix_import; still won't handle absolute and local imports on the same line ........ r67984 | benjamin.peterson | 2008-12-28 09:55:16 -0600 (Sun, 28 Dec 2008) | 1 line don't need loop ........ r67991 | benjamin.peterson | 2008-12-28 14:30:26 -0600 (Sun, 28 Dec 2008) | 1 line actually call finish_tree() ........ r67992 | benjamin.peterson | 2008-12-28 14:34:47 -0600 (Sun, 28 Dec 2008) | 1 line remove useless test ........ r67993 | benjamin.peterson | 2008-12-28 15:04:32 -0600 (Sun, 28 Dec 2008) | 1 line update pyk3's test grammar ........ r68106 | benjamin.peterson | 2008-12-31 11:53:58 -0600 (Wed, 31 Dec 2008) | 1 line #2734 don't convert every instance of long (eg if it's an attribute) ........ r68107 | benjamin.peterson | 2008-12-31 11:55:10 -0600 (Wed, 31 Dec 2008) | 1 line add another test ........ r68108 | benjamin.peterson | 2008-12-31 12:00:12 -0600 (Wed, 31 Dec 2008) | 1 line don't change long even if it's the only argument name ........ r68110 | benjamin.peterson | 2008-12-31 14:13:26 -0600 (Wed, 31 Dec 2008) | 1 line remove unused import ........
90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
"""Fixer for import statements.
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If spam is being imported from the local directory, this import:
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from spam import eggs
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Becomes:
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from .spam import eggs
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And this import:
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import spam
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Becomes:
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from . import spam
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"""
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# Local imports
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from .. import fixer_base
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from os.path import dirname, join, exists, pathsep
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from ..fixer_util import FromImport, syms, token
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def traverse_imports(names):
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"""
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Walks over all the names imported in a dotted_as_names node.
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"""
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pending = [names]
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while pending:
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node = pending.pop()
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if node.type == token.NAME:
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yield node.value
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elif node.type == syms.dotted_name:
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yield "".join([ch.value for ch in node.children])
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elif node.type == syms.dotted_as_name:
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pending.append(node.children[0])
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elif node.type == syms.dotted_as_names:
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pending.extend(node.children[::-2])
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else:
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raise AssertionError("unkown node type")
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class FixImport(fixer_base.BaseFix):
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PATTERN = """
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import_from< 'from' imp=any 'import' ['('] any [')'] >
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import_name< 'import' imp=any >
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"""
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def transform(self, node, results):
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imp = results['imp']
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if node.type == syms.import_from:
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# Some imps are top-level (eg: 'import ham')
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# some are first level (eg: 'import ham.eggs')
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# some are third level (eg: 'import ham.eggs as spam')
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# Hence, the loop
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while not hasattr(imp, 'value'):
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imp = imp.children[0]
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if self.probably_a_local_import(imp.value):
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imp.value = "." + imp.value
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imp.changed()
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return node
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else:
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have_local = False
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have_absolute = False
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for mod_name in traverse_imports(imp):
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if self.probably_a_local_import(mod_name):
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have_local = True
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else:
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have_absolute = True
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if have_absolute:
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if have_local:
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# We won't handle both sibling and absolute imports in the
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# same statement at the moment.
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self.warning(node, "absolute and local imports together")
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return
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new = FromImport('.', [imp])
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new.set_prefix(node.get_prefix())
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return new
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def probably_a_local_import(self, imp_name):
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imp_name = imp_name.split('.', 1)[0]
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base_path = dirname(self.filename)
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base_path = join(base_path, imp_name)
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# If there is no __init__.py next to the file its not in a package
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# so can't be a relative import.
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if not exists(join(dirname(base_path), '__init__.py')):
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return False
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for ext in ['.py', pathsep, '.pyc', '.so', '.sl', '.pyd']:
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if exists(base_path + ext):
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return True
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return False
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