this module is used to map the old python 2 names to the new names used in python 3 for the pickle module this needed to make pickle streams generated with python 2 loadable by python 3 this is a copy of lib2to3 fixes fiximports mapping we cannot import lib2to3 and use the mapping defined there because lib2to3 uses pickle thus this could cause the module to be imported recursively this contains rename rules that are easy to handle we ignore the more complex stuff e g mapping the names in the urllib and types modules these rules should be run before import names are fixed standarderror is gone in python 3 so we map it to exception same but for 3 x to 2 x nonmutual mappings for compatibility with broken pickles saved in old python 3 versions this module is used to map the old python 2 names to the new names used in python 3 for the pickle module this needed to make pickle streams generated with python 2 loadable by python 3 this is a copy of lib2to3 fixes fix_imports mapping we cannot import lib2to3 and use the mapping defined there because lib2to3 uses pickle thus this could cause the module to be imported recursively this contains rename rules that are easy to handle we ignore the more complex stuff e g mapping the names in the urllib and types modules these rules should be run before import names are fixed standarderror is gone in python 3 so we map it to exception same but for 3 x to 2 x non mutual mappings for compatibility with broken pickles saved in old python 3 versions
IMPORT_MAPPING = {
    '__builtin__' : 'builtins',
    'copy_reg': 'copyreg',
    'Queue': 'queue',
    'SocketServer': 'socketserver',
    'ConfigParser': 'configparser',
    'repr': 'reprlib',
    'tkFileDialog': 'tkinter.filedialog',
    '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',
    'ttk': 'tkinter.ttk',
    'Tkinter': 'tkinter',
    'markupbase': '_markupbase',
    '_winreg': 'winreg',
    'thread': '_thread',
    'dummy_thread': '_dummy_thread',
    'dbhash': 'dbm.bsd',
    'dumbdbm': 'dbm.dumb',
    'dbm': 'dbm.ndbm',
    'gdbm': 'dbm.gnu',
    'xmlrpclib': 'xmlrpc.client',
    'SimpleXMLRPCServer': 'xmlrpc.server',
    'httplib': 'http.client',
    'htmlentitydefs' : 'html.entities',
    'HTMLParser' : 'html.parser',
    'Cookie': 'http.cookies',
    'cookielib': 'http.cookiejar',
    'BaseHTTPServer': 'http.server',
    'test.test_support': 'test.support',
    'commands': 'subprocess',
    'urlparse' : 'urllib.parse',
    'robotparser' : 'urllib.robotparser',
    'urllib2': 'urllib.request',
    'anydbm': 'dbm',
    '_abcoll' : 'collections.abc',
}





NAME_MAPPING = {
    ('__builtin__', 'xrange'):     ('builtins', 'range'),
    ('__builtin__', 'reduce'):     ('functools', 'reduce'),
    ('__builtin__', 'intern'):     ('sys', 'intern'),
    ('__builtin__', 'unichr'):     ('builtins', 'chr'),
    ('__builtin__', 'unicode'):    ('builtins', 'str'),
    ('__builtin__', 'long'):       ('builtins', 'int'),
    ('itertools', 'izip'):         ('builtins', 'zip'),
    ('itertools', 'imap'):         ('builtins', 'map'),
    ('itertools', 'ifilter'):      ('builtins', 'filter'),
    ('itertools', 'ifilterfalse'): ('itertools', 'filterfalse'),
    ('itertools', 'izip_longest'): ('itertools', 'zip_longest'),
    ('UserDict', 'IterableUserDict'): ('collections', 'UserDict'),
    ('UserList', 'UserList'): ('collections', 'UserList'),
    ('UserString', 'UserString'): ('collections', 'UserString'),
    ('whichdb', 'whichdb'): ('dbm', 'whichdb'),
    ('_socket', 'fromfd'): ('socket', 'fromfd'),
    ('_multiprocessing', 'Connection'): ('multiprocessing.connection', 'Connection'),
    ('multiprocessing.process', 'Process'): ('multiprocessing.context', 'Process'),
    ('multiprocessing.forking', 'Popen'): ('multiprocessing.popen_fork', 'Popen'),
    ('urllib', 'ContentTooShortError'): ('urllib.error', 'ContentTooShortError'),
    ('urllib', 'getproxies'): ('urllib.request', 'getproxies'),
    ('urllib', 'pathname2url'): ('urllib.request', 'pathname2url'),
    ('urllib', 'quote_plus'): ('urllib.parse', 'quote_plus'),
    ('urllib', 'quote'): ('urllib.parse', 'quote'),
    ('urllib', 'unquote_plus'): ('urllib.parse', 'unquote_plus'),
    ('urllib', 'unquote'): ('urllib.parse', 'unquote'),
    ('urllib', 'url2pathname'): ('urllib.request', 'url2pathname'),
    ('urllib', 'urlcleanup'): ('urllib.request', 'urlcleanup'),
    ('urllib', 'urlencode'): ('urllib.parse', 'urlencode'),
    ('urllib', 'urlopen'): ('urllib.request', 'urlopen'),
    ('urllib', 'urlretrieve'): ('urllib.request', 'urlretrieve'),
    ('urllib2', 'HTTPError'): ('urllib.error', 'HTTPError'),
    ('urllib2', 'URLError'): ('urllib.error', 'URLError'),
}

PYTHON2_EXCEPTIONS = (
    "ArithmeticError",
    "AssertionError",
    "AttributeError",
    "BaseException",
    "BufferError",
    "BytesWarning",
    "DeprecationWarning",
    "EOFError",
    "EnvironmentError",
    "Exception",
    "FloatingPointError",
    "FutureWarning",
    "GeneratorExit",
    "IOError",
    "ImportError",
    "ImportWarning",
    "IndentationError",
    "IndexError",
    "KeyError",
    "KeyboardInterrupt",
    "LookupError",
    "MemoryError",
    "NameError",
    "NotImplementedError",
    "OSError",
    "OverflowError",
    "PendingDeprecationWarning",
    "ReferenceError",
    "RuntimeError",
    "RuntimeWarning",
    
    "StopIteration",
    "SyntaxError",
    "SyntaxWarning",
    "SystemError",
    "SystemExit",
    "TabError",
    "TypeError",
    "UnboundLocalError",
    "UnicodeDecodeError",
    "UnicodeEncodeError",
    "UnicodeError",
    "UnicodeTranslateError",
    "UnicodeWarning",
    "UserWarning",
    "ValueError",
    "Warning",
    "ZeroDivisionError",
)

try:
    WindowsError
except NameError:
    pass
else:
    PYTHON2_EXCEPTIONS += ("WindowsError",)

for excname in PYTHON2_EXCEPTIONS:
    NAME_MAPPING[("exceptions", excname)] = ("builtins", excname)

MULTIPROCESSING_EXCEPTIONS = (
    'AuthenticationError',
    'BufferTooShort',
    'ProcessError',
    'TimeoutError',
)

for excname in MULTIPROCESSING_EXCEPTIONS:
    NAME_MAPPING[("multiprocessing", excname)] = ("multiprocessing.context", excname)


REVERSE_IMPORT_MAPPING = dict((v, k) for (k, v) in IMPORT_MAPPING.items())
assert len(REVERSE_IMPORT_MAPPING) == len(IMPORT_MAPPING)
REVERSE_NAME_MAPPING = dict((v, k) for (k, v) in NAME_MAPPING.items())
assert len(REVERSE_NAME_MAPPING) == len(NAME_MAPPING)



IMPORT_MAPPING.update({
    'cPickle': 'pickle',
    '_elementtree': 'xml.etree.ElementTree',
    'FileDialog': 'tkinter.filedialog',
    'SimpleDialog': 'tkinter.simpledialog',
    'DocXMLRPCServer': 'xmlrpc.server',
    'SimpleHTTPServer': 'http.server',
    'CGIHTTPServer': 'http.server',
    
    'UserDict': 'collections',
    'UserList': 'collections',
    'UserString': 'collections',
    'whichdb': 'dbm',
    'StringIO':  'io',
    'cStringIO': 'io',
})

REVERSE_IMPORT_MAPPING.update({
    '_bz2': 'bz2',
    '_dbm': 'dbm',
    '_functools': 'functools',
    '_gdbm': 'gdbm',
    '_pickle': 'pickle',
})

NAME_MAPPING.update({
    ('__builtin__', 'basestring'): ('builtins', 'str'),
    ('exceptions', 'StandardError'): ('builtins', 'Exception'),
    ('UserDict', 'UserDict'): ('collections', 'UserDict'),
    ('socket', '_socketobject'): ('socket', 'SocketType'),
})

REVERSE_NAME_MAPPING.update({
    ('_functools', 'reduce'): ('__builtin__', 'reduce'),
    ('tkinter.filedialog', 'FileDialog'): ('FileDialog', 'FileDialog'),
    ('tkinter.filedialog', 'LoadFileDialog'): ('FileDialog', 'LoadFileDialog'),
    ('tkinter.filedialog', 'SaveFileDialog'): ('FileDialog', 'SaveFileDialog'),
    ('tkinter.simpledialog', 'SimpleDialog'): ('SimpleDialog', 'SimpleDialog'),
    ('xmlrpc.server', 'ServerHTMLDoc'): ('DocXMLRPCServer', 'ServerHTMLDoc'),
    ('xmlrpc.server', 'XMLRPCDocGenerator'):
        ('DocXMLRPCServer', 'XMLRPCDocGenerator'),
    ('xmlrpc.server', 'DocXMLRPCRequestHandler'):
        ('DocXMLRPCServer', 'DocXMLRPCRequestHandler'),
    ('xmlrpc.server', 'DocXMLRPCServer'):
        ('DocXMLRPCServer', 'DocXMLRPCServer'),
    ('xmlrpc.server', 'DocCGIXMLRPCRequestHandler'):
        ('DocXMLRPCServer', 'DocCGIXMLRPCRequestHandler'),
    ('http.server', 'SimpleHTTPRequestHandler'):
        ('SimpleHTTPServer', 'SimpleHTTPRequestHandler'),
    ('http.server', 'CGIHTTPRequestHandler'):
        ('CGIHTTPServer', 'CGIHTTPRequestHandler'),
    ('_socket', 'socket'): ('socket', '_socketobject'),
})

PYTHON3_OSERROR_EXCEPTIONS = (
    'BrokenPipeError',
    'ChildProcessError',
    'ConnectionAbortedError',
    'ConnectionError',
    'ConnectionRefusedError',
    'ConnectionResetError',
    'FileExistsError',
    'FileNotFoundError',
    'InterruptedError',
    'IsADirectoryError',
    'NotADirectoryError',
    'PermissionError',
    'ProcessLookupError',
    'TimeoutError',
)

for excname in PYTHON3_OSERROR_EXCEPTIONS:
    REVERSE_NAME_MAPPING[('builtins', excname)] = ('exceptions', 'OSError')

PYTHON3_IMPORTERROR_EXCEPTIONS = (
    'ModuleNotFoundError',
)

for excname in PYTHON3_IMPORTERROR_EXCEPTIONS:
    REVERSE_NAME_MAPPING[('builtins', excname)] = ('exceptions', 'ImportError')
del excname