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