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71 lines
2.2 KiB
71 lines
2.2 KiB
6 years ago
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"""Fix incompatible renames
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Fixes:
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* sys.maxint -> sys.maxsize
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"""
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# Author: Christian Heimes
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# based on Collin Winter's fix_import
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# Local imports
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from .. import fixer_base
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from ..fixer_util import Name, attr_chain
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MAPPING = {"sys": {"maxint" : "maxsize"},
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}
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LOOKUP = {}
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def alternates(members):
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return "(" + "|".join(map(repr, members)) + ")"
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def build_pattern():
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#bare = set()
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for module, replace in list(MAPPING.items()):
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for old_attr, new_attr in list(replace.items()):
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LOOKUP[(module, old_attr)] = new_attr
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#bare.add(module)
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#bare.add(old_attr)
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#yield """
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# import_name< 'import' (module=%r
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# | dotted_as_names< any* module=%r any* >) >
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# """ % (module, module)
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yield """
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import_from< 'from' module_name=%r 'import'
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( attr_name=%r | import_as_name< attr_name=%r 'as' any >) >
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""" % (module, old_attr, old_attr)
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yield """
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power< module_name=%r trailer< '.' attr_name=%r > any* >
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""" % (module, old_attr)
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#yield """bare_name=%s""" % alternates(bare)
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class FixRenames(fixer_base.BaseFix):
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BM_compatible = True
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PATTERN = "|".join(build_pattern())
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order = "pre" # Pre-order tree traversal
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# Don't match the node if it's within another match
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def match(self, node):
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match = super(FixRenames, self).match
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results = match(node)
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if results:
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if any(match(obj) for obj in attr_chain(node, "parent")):
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return False
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return results
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return False
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#def start_tree(self, tree, filename):
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# super(FixRenames, self).start_tree(tree, filename)
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# self.replace = {}
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def transform(self, node, results):
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mod_name = results.get("module_name")
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attr_name = results.get("attr_name")
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#bare_name = results.get("bare_name")
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#import_mod = results.get("module")
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if mod_name and attr_name:
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new_attr = LOOKUP[(mod_name.value, attr_name.value)]
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attr_name.replace(Name(new_attr, prefix=attr_name.prefix))
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