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"""Fix incompatible imports and module references."""
# Authors: Collin Winter, Nick Edds
# Local imports
from .. import fixer_base
from ..fixer_util import Name, attr_chain
MAPPING = {'StringIO': 'io',
'cStringIO': 'io',
'cPickle': 'pickle',
'__builtin__' : 'builtins',
'copy_reg': 'copyreg',
'Queue': 'queue',
'SocketServer': 'socketserver',
'ConfigParser': 'configparser',
'repr': 'reprlib',
'FileDialog': 'tkinter.filedialog',
'tkFileDialog': 'tkinter.filedialog',
'SimpleDialog': 'tkinter.simpledialog',
'tkSimpleDialog': 'tkinter.simpledialog',
'tkColorChooser': 'tkinter.colorchooser',
'tkCommonDialog': 'tkinter.commondialog',
'Dialog': 'tkinter.dialog',
'Tkdnd': 'tkinter.dnd',
'tkFont': 'tkinter.font',
'tkMessageBox': 'tkinter.messagebox',
'ScrolledText': 'tkinter.scrolledtext',
'Tkconstants': 'tkinter.constants',
'Tix': 'tkinter.tix',
'ttk': 'tkinter.ttk',
'Tkinter': 'tkinter',
'markupbase': '_markupbase',
'_winreg': 'winreg',
'thread': '_thread',
'dummy_thread': '_dummy_thread',
# anydbm and whichdb are handled by fix_imports2
'dbhash': 'dbm.bsd',
'dumbdbm': 'dbm.dumb',
'dbm': 'dbm.ndbm',
'gdbm': 'dbm.gnu',
'xmlrpclib': 'xmlrpc.client',
'DocXMLRPCServer': 'xmlrpc.server',
'SimpleXMLRPCServer': 'xmlrpc.server',
'httplib': 'http.client',
'htmlentitydefs' : 'html.entities',
'HTMLParser' : 'html.parser',
'Cookie': 'http.cookies',
'cookielib': 'http.cookiejar',
'BaseHTTPServer': 'http.server',
'SimpleHTTPServer': 'http.server',
'CGIHTTPServer': 'http.server',
#'test.test_support': 'test.support',
'commands': 'subprocess',
'UserString' : 'collections',
'UserList' : 'collections',
'urlparse' : 'urllib.parse',
'robotparser' : 'urllib.robotparser',
}
def alternates(members):
return "(" + "|".join(map(repr, members)) + ")"
def build_pattern(mapping=MAPPING):
mod_list = ' | '.join(["module_name='%s'" % key for key in mapping])
bare_names = alternates(mapping.keys())
yield """name_import=import_name< 'import' ((%s) |
multiple_imports=dotted_as_names< any* (%s) any* >) >
""" % (mod_list, mod_list)
yield """import_from< 'from' (%s) 'import' ['(']
( any | import_as_name< any 'as' any > |
import_as_names< any* >) [')'] >
""" % mod_list
yield """import_name< 'import' (dotted_as_name< (%s) 'as' any > |
multiple_imports=dotted_as_names<
any* dotted_as_name< (%s) 'as' any > any* >) >
""" % (mod_list, mod_list)
# Find usages of module members in code e.g. thread.foo(bar)
yield "power< bare_with_attr=(%s) trailer<'.' any > any* >" % bare_names
class FixImports(fixer_base.BaseFix):
BM_compatible = True
keep_line_order = True
# This is overridden in fix_imports2.
mapping = MAPPING
# We want to run this fixer late, so fix_import doesn't try to make stdlib
# renames into relative imports.
run_order = 6
def build_pattern(self):
return "|".join(build_pattern(self.mapping))
def compile_pattern(self):
# We override this, so MAPPING can be pragmatically altered and the
# changes will be reflected in PATTERN.
self.PATTERN = self.build_pattern()
super(FixImports, self).compile_pattern()
# Don't match the node if it's within another match.
def match(self, node):
match = super(FixImports, self).match
results = match(node)
if results:
# Module usage could be in the trailer of an attribute lookup, so we
# might have nested matches when "bare_with_attr" is present.
if "bare_with_attr" not in results and \
any(match(obj) for obj in attr_chain(node, "parent")):
return False
return results
return False
def start_tree(self, tree, filename):
super(FixImports, self).start_tree(tree, filename)
self.replace = {}
def transform(self, node, results):
import_mod = results.get("module_name")
if import_mod:
mod_name = import_mod.value
new_name = self.mapping[mod_name]
import_mod.replace(Name(new_name, prefix=import_mod.prefix))
if "name_import" in results:
# If it's not a "from x import x, y" or "import x as y" import,
# marked its usage to be replaced.
self.replace[mod_name] = new_name
if "multiple_imports" in results:
# This is a nasty hack to fix multiple imports on a line (e.g.,
# "import StringIO, urlparse"). The problem is that I can't
# figure out an easy way to make a pattern recognize the keys of
# MAPPING randomly sprinkled in an import statement.
results = self.match(node)
if results:
self.transform(node, results)
else:
# Replace usage of the module.
bare_name = results["bare_with_attr"][0]
new_name = self.replace.get(bare_name.value)
if new_name:
bare_name.replace(Name(new_name, prefix=bare_name.prefix))