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To ensure compatibility from Python ``2.7`` - ``3.x``, a module has been
created. Clearly there is huge need to use conforming syntax.
import binascii
import errno
import pkgutil
import warnings
import inspect
import subprocess
    import importlib
except ImportError:
is_py3 = sys.version_info[0] >= 3
is_py33 = is_py3 and sys.version_info[1] >= 3
is_py34 = is_py3 and sys.version_info[1] >= 4
is_py35 = is_py3 and sys.version_info[1] >= 5
py_version = int(str(sys.version_info[0]) + str(sys.version_info[1]))
class DummyFile(object):
    def __init__(self, loader, string):
        self.loader = loader
        self.string = string
    def read(self):
        return self.loader.get_source(self.string)
    def close(self):
        del self.loader
def find_module_py34(string, path=None, full_name=None):
    spec = None
    loader = None
    spec = importlib.machinery.PathFinder.find_spec(string, path)
    if spec is not None:
        # We try to disambiguate implicit namespace pkgs with non implicit namespace pkgs
        if not spec.has_location:
            full_name = string if not path else full_name
            implicit_ns_info = ImplicitNSInfo(full_name, spec.submodule_search_locations._path)
            return None, implicit_ns_info, False
        # we have found the tail end of the dotted path
        loader = spec.loader
    return find_module_py33(string, path, loader)
def find_module_py33(string, path=None, loader=None, full_name=None):
    loader = loader or importlib.machinery.PathFinder.find_module(string, path)
    if loader is None and path is None:  # Fallback to find builtins
        try:
            with warnings.catch_warnings(record=True):
                # Mute "DeprecationWarning: Use importlib.util.find_spec()
                # instead." While we should replace that in the future, it's
                # probably good to wait until we deprecate Python 3.3, since
                # it was added in Python 3.4 and find_loader hasn't been
                # removed in 3.6.
                loader = importlib.find_loader(string)
        except ValueError as e:
            # See #491. Importlib might raise a ValueError, to avoid this, we
            # just raise an ImportError to fix the issue.
            raise ImportError("Originally  " + repr(e))
    if loader is None:
        raise ImportError("Couldn't find a loader for {}".format(string))
        is_package = loader.is_package(string)
        if is_package:
            if hasattr(loader, 'path'):
                module_path = os.path.dirname(loader.path)
            else:
                # At least zipimporter does not have path attribute
                module_path = os.path.dirname(loader.get_filename(string))
            if hasattr(loader, 'archive'):
                module_file = DummyFile(loader, string)
            else:
                module_file = None
        else:
            module_path = loader.get_filename(string)
            module_file = DummyFile(loader, string)
    except AttributeError:
        # ExtensionLoader has not attribute get_filename, instead it has a
        # path attribute that we can use to retrieve the module path
        try:
            module_path = loader.path
            module_file = DummyFile(loader, string)
        except AttributeError:
            module_path = string
            module_file = None
        finally:
            is_package = False
    if hasattr(loader, 'archive'):
        module_path = loader.archive
    return module_file, module_path, is_package
def find_module_pre_py33(string, path=None, full_name=None):
    # This import is here, because in other places it will raise a
    # DeprecationWarning.
    import imp
        module_file, module_path, description = imp.find_module(string, path)
        module_type = description[2]
        return module_file, module_path, module_type is imp.PKG_DIRECTORY
    except ImportError:
        pass
    if path is None:
        path = sys.path
    for item in path:
        loader = pkgutil.get_importer(item)
        if loader:
            try:
                loader = loader.find_module(string)
                if loader:
                    is_package = loader.is_package(string)
                    is_archive = hasattr(loader, 'archive')
                    module_path = loader.get_filename(string)
                    if is_package:
                        module_path = os.path.dirname(module_path)
                    if is_archive:
                        module_path = loader.archive
                    file = None
                    if not is_package or is_archive:
                        file = DummyFile(loader, string)
                    return file, module_path, is_package
            except ImportError:
    raise ImportError("No module named {}".format(string))
find_module = find_module_py33 if is_py33 else find_module_pre_py33
find_module = find_module_py34 if is_py34 else find_module
find_module.__doc__ = """
Provides information about a module.
This function isolates the differences in importing libraries introduced with
python 3.3 on; it gets a module name and optionally a path. It will return a
tuple containin an open file for the module (if not builtin), the filename
or the name of the module if it is a builtin one and a boolean indicating
if the module is contained in a package.
def _iter_modules(paths, prefix=''):
    # Copy of pkgutil.iter_modules adapted to work with namespaces
    for path in paths:
        importer = pkgutil.get_importer(path)
        if not isinstance(importer, importlib.machinery.FileFinder):
            # We're only modifying the case for FileFinder. All the other cases
            # still need to be checked (like zip-importing). Do this by just
            # calling the pkgutil version.
            for mod_info in pkgutil.iter_modules([path], prefix):
                yield mod_info
            continue
        # START COPY OF pkutils._iter_file_finder_modules.
        if importer.path is None or not os.path.isdir(importer.path):
            return
        yielded = {}
        try:
            filenames = os.listdir(importer.path)
        except OSError:
            # ignore unreadable directories like import does
            filenames = []
        filenames.sort()  # handle packages before same-named modules
        for fn in filenames:
            modname = inspect.getmodulename(fn)
            if modname == '__init__' or modname in yielded:
                continue
            # jedi addition: Avoid traversing special directories
            if fn.startswith('.') or fn == '__pycache__':
                continue
            path = os.path.join(importer.path, fn)
            ispkg = False
            if not modname and os.path.isdir(path) and '.' not in fn:
                modname = fn
                # A few jedi modifications: Don't check if there's an
                # __init__.py
                    os.listdir(path)
                except OSError:
                    # ignore unreadable directories like import does
                    continue
                ispkg = True
            if modname and '.' not in modname:
                yielded[modname] = 1
                yield importer, prefix + modname, ispkg
        # END COPY
iter_modules = _iter_modules if py_version >= 34 else pkgutil.iter_modules
class ImplicitNSInfo(object):
    """Stores information returned from an implicit namespace spec"""
    def __init__(self, name, paths):
        self.name = name
        self.paths = paths
    all_suffixes = importlib.machinery.all_suffixes
    def all_suffixes():
        # Is deprecated and raises a warning in Python 3.6.
        import imp
        return [suffix for suffix, _, _ in imp.get_suffixes()]
# unicode function
    unicode = unicode
except NameError:
    unicode = str
# re-raise function
    def reraise(exception, traceback):
        raise exception.with_traceback(traceback)
    eval(compile("""
def reraise(exception, traceback):
    raise exception, None, traceback
""", 'blub', 'exec'))
reraise.__doc__ = """
Re-raise `exception` with a `traceback` object.
    reraise(Exception, sys.exc_info()[2])
class Python3Method(object):
    def __init__(self, func):
        self.func = func
    def __get__(self, obj, objtype):
        if obj is None:
            return lambda *args, **kwargs: self.func(*args, **kwargs)
        else:
            return lambda *args, **kwargs: self.func(obj, *args, **kwargs)
def use_metaclass(meta, *bases):
    """ Create a class with a metaclass. """
    if not bases:
        bases = (object,)
    return meta("Py2CompatibilityMetaClass", bases, {})
    encoding = sys.stdout.encoding
    if encoding is None:
        encoding = 'utf-8'
except AttributeError:
    encoding = 'ascii'
def u(string, errors='strict'):
    """Cast to unicode DAMMIT!
    Written because Python2 repr always implicitly casts to a string, so we
    have to cast back to a unicode (and we now that we always deal with valid
    unicode, because we check that in the beginning).
    if isinstance(string, bytes):
        return unicode(string, encoding='UTF-8', errors=errors)
    return string
def cast_path(obj):
    Take a bytes or str path and cast it to unicode.
    Apparently it is perfectly fine to pass both byte and unicode objects into
    the sys.path. This probably means that byte paths are normal at other
    places as well.
    Since this just really complicates everything and Python 2.7 will be EOL
    soon anyway, just go with always strings.
    return u(obj, errors='replace')
def force_unicode(obj):
    # Intentionally don't mix those two up, because those two code paths might
    # be different in the future (maybe windows?).
    return cast_path(obj)
    import builtins  # module name in python 3
except ImportError:
    import __builtin__ as builtins
def literal_eval(string):
    return ast.literal_eval(string)
    from itertools import zip_longest
except ImportError:
    from itertools import izip_longest as zip_longest  # Python 2
    FileNotFoundError = FileNotFoundError
except NameError:
    FileNotFoundError = IOError
    NotADirectoryError = NotADirectoryError
except NameError:
    NotADirectoryError = IOError
def no_unicode_pprint(dct):
    Python 2/3 dict __repr__ may be different, because of unicode differens
    (with or without a `u` prefix). Normally in doctests we could use `pprint`
    to sort dicts and check for equality, but here we have to write a separate
    function to do that.
    import pprint
    s = pprint.pformat(dct)
    print(re.sub("u'", "'", s))
def print_to_stderr(*args):
    if is_py3:
        eval("print(*args, file=sys.stderr)")
        print >> sys.stderr, args
def utf8_repr(func):
    ``__repr__`` methods in Python 2 don't allow unicode objects to be
    returned. Therefore cast them to utf-8 bytes in this decorator.
    def wrapper(self):
        result = func(self)
        if isinstance(result, unicode):
            return result.encode('utf-8')
        else:
            return result
    if is_py3:
        return func
        return wrapper
    import queue
    import Queue as queue
import pickle
if sys.version_info[:2] == (3, 3):
    Monkeypatch the unpickler in Python 3.3. This is needed, because the
    argument `encoding='bytes'` is not supported in 3.3, but badly needed to
    communicate with Python 2.
    class NewUnpickler(pickle._Unpickler):
        dispatch = dict(pickle._Unpickler.dispatch)
        def _decode_string(self, value):
            # Used to allow strings from Python 2 to be decoded either as
            # bytes or Unicode strings.  This should be used only with the
            # STRING, BINSTRING and SHORT_BINSTRING opcodes.
            if self.encoding == "bytes":
                return value
            else:
                return value.decode(self.encoding, self.errors)
        def load_string(self):
            data = self.readline()[:-1]
            # Strip outermost quotes
            if len(data) >= 2 and data[0] == data[-1] and data[0] in b'"\'':
                data = data[1:-1]
            else:
                raise pickle.UnpicklingError("the STRING opcode argument must be quoted")
            self.append(self._decode_string(pickle.codecs.escape_decode(data)[0]))
        dispatch[pickle.STRING[0]] = load_string
        def load_binstring(self):
            # Deprecated BINSTRING uses signed 32-bit length
            len, = pickle.struct.unpack('<i', self.read(4))
            if len < 0:
                raise pickle.UnpicklingError("BINSTRING pickle has negative byte count")
            data = self.read(len)
            self.append(self._decode_string(data))
        dispatch[pickle.BINSTRING[0]] = load_binstring
        def load_short_binstring(self):
            len = self.read(1)[0]
            data = self.read(len)
            self.append(self._decode_string(data))
        dispatch[pickle.SHORT_BINSTRING[0]] = load_short_binstring
    def load(file, fix_imports=True, encoding="ASCII", errors="strict"):
        return NewUnpickler(file, fix_imports=fix_imports,
                            encoding=encoding, errors=errors).load()
    def loads(s, fix_imports=True, encoding="ASCII", errors="strict"):
        if isinstance(s, str):
            raise TypeError("Can't load pickle from unicode string")
        file = pickle.io.BytesIO(s)
        return NewUnpickler(file, fix_imports=fix_imports,
                            encoding=encoding, errors=errors).load()
    pickle.Unpickler = NewUnpickler
    pickle.load = load
    pickle.loads = loads
_PICKLE_PROTOCOL = 2
is_windows = sys.platform == 'win32'
# The Windows shell on Python 2 consumes all control characters (below 32) and expand on
# all Python versions \n to \r\n.
# pickle starting from protocol version 1 uses binary data, which could not be escaped by
# any normal unicode encoder. Therefore, the only bytes encoder which doesn't produce
# control characters is binascii.hexlify.
def pickle_load(file):
    if is_windows:
        try:
            data = file.readline()
            data = binascii.unhexlify(data.strip())
            if is_py3:
                return pickle.loads(data, encoding='bytes')
            else:
                return pickle.loads(data)
        # Python on Windows don't throw EOF errors for pipes. So reraise them with
        # the correct type, which is cought upwards.
        except OSError:
            raise EOFError()
        if is_py3:
            return pickle.load(file, encoding='bytes')
        else:
            return pickle.load(file)
def pickle_dump(data, file):
    if is_windows:
        try:
            data = pickle.dumps(data, protocol=_PICKLE_PROTOCOL)
            data = binascii.hexlify(data)
            file.write(data)
            file.write(b'\n')
            # On Python 3.3 flush throws sometimes an error even if the two file writes
            # should done it already before. This could be also computer / speed depending.
            file.flush()
        # Python on Windows don't throw EPIPE errors for pipes. So reraise them with
        # the correct type and error number.
        except OSError:
            raise IOError(errno.EPIPE, "Broken pipe")
        pickle.dump(data, file, protocol=_PICKLE_PROTOCOL)
        file.flush()
    from inspect import Parameter
except ImportError:
    class Parameter(object):
        POSITIONAL_ONLY = object()
        POSITIONAL_OR_KEYWORD = object()
        VAR_POSITIONAL = object()
        KEYWORD_ONLY = object()
        VAR_KEYWORD = object()
class GeneralizedPopen(subprocess.Popen):
    def __init__(self, *args, **kwargs):
        if os.name == 'nt':
            try:
                # Was introduced in Python 3.7.
                CREATE_NO_WINDOW = subprocess.CREATE_NO_WINDOW
            except AttributeError:
                CREATE_NO_WINDOW = 0x08000000
            kwargs['creationflags'] = CREATE_NO_WINDOW
        super(GeneralizedPopen, self).__init__(*args, **kwargs)
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