How to use the jedi._compatibility.unicode function in jedi

return []
    bin_path = os.path.join(project_root, 'bin')
    if not os.path.exists(bin_path):
        return []
    extra_module_paths = []
    for filename in os.listdir(bin_path):
        try:
            filepath = os.path.join(bin_path, filename)
            with open(filepath, 'r') as f:
                firstline = f.readline()
                if firstline.startswith('#!') and 'python' in firstline:
                    extra_module_paths.append(filepath)
        except (UnicodeDecodeError, IOError) as e:
            # Probably a binary file; permission error or race cond. because file got deleted
            # ignore
            debug.warning(unicode(e))
            continue
    return extra_module_paths

def _load_faked_module(grammar, module):
    module_name = module.__name__
    if module_name == '__builtin__' and not is_py3:
        module_name = 'builtins'

    try:
        return modules[module_name]
    except KeyError:
        path = os.path.dirname(os.path.abspath(__file__))
        try:
            with open(os.path.join(path, 'fake', module_name) + '.pym') as f:
                source = f.read()
        except IOError:
            modules[module_name] = None
            return
        modules[module_name] = m = grammar.parse(unicode(source))

        if module_name == 'builtins' and not is_py3:
            # There are two implementations of `open` for either python 2/3.
            # -> Rename the python2 version (`look at fake/builtins.pym`).
            open_func = _search_scope(m, 'open')
            open_func.children[1].value = 'open_python3'
            open_func = _search_scope(m, 'open_python2')
            open_func.children[1].value = 'open'
        return m

def get_call_signature(self, width=72, func_name=None):
        """
        Generate call signature of this function.

        :param width: Fold lines if a line is longer than this value.
        :type width: int
        :arg func_name: Override function name when given.
        :type func_name: str

        :rtype: str
        """
        func_name = func_name or self.children[1]
        code = unicode(func_name) + self.children[2].get_code()
        return '\n'.join(textwrap.wrap(code, width))

def get_call_signature(self, width=72, func_name=None):
        """
        Generate call signature of this function.

        :param width: Fold lines if a line is longer than this value.
        :type width: int
        :arg func_name: Override function name when given.
        :type func_name: str

        :rtype: str
        """
        func_name = func_name or self.children[1]
        code = unicode(func_name) + self.children[2].get_code()
        return '\n'.join(textwrap.wrap(code, width))

lhs, search_name = test_lhs()
            if lhs is None:
                expression_list = stmt.expression_list()
                if len(expression_list) == 0:
                    return [], ''
                # Only the first command is important, the rest should basically not
                # happen except in broken code (e.g. docstrings that aren't code).
                call = expression_list[0]
                if isinstance(call, pr.Call):
                    call_path = list(call.generate_call_path())
                else:
                    call_path = [call]

                defs, search_name_part = self._evaluator.goto(stmt, call_path)
                search_name = unicode(search_name_part)
                definitions = follow_inexistent_imports(defs)
            else:
                definitions = [lhs]
            if isinstance(user_stmt, pr.Statement):
                c = user_stmt.expression_list()
                if c and not isinstance(c[0], (str, unicode)) \
                        and c[0].start_pos > self._pos \
                        and not re.search(r'\.\w+$', goto_path):
                    # The cursor must be after the start, otherwise the
                    # statement is just an assignee.
                    definitions = [user_stmt]
        return definitions, search_name

def get_call_signature(self, width=72, funcname=None):
        """
        Generate call signature of this function.

        :param width: Fold lines if a line is longer than this value.
        :type width: int
        :arg funcname: Override function name when given.
        :type funcname: str

        :rtype: str
        """
        l = unicode(funcname or self.name.names[-1]) + '('
        lines = []
        for (i, p) in enumerate(self.params):
            code = p.get_code(False)
            if i != len(self.params) - 1:
                code += ', '
            if len(l + code) > width:
                lines.append(l[:-1] if l[-1] == ' ' else l)
                l = code
            else:
                l += code
        if l:
            lines.append(l)
        lines[-1] += ')'
        return '\n'.join(lines)

return []
    bin_path = os.path.join(project_root, 'bin')
    if not os.path.exists(bin_path):
        return []
    extra_module_paths = []
    for filename in os.listdir(bin_path):
        try:
            filepath = os.path.join(bin_path, filename)
            with open(filepath, 'r') as f:
                firstline = f.readline()
                if firstline.startswith('#!') and 'python' in firstline:
                    extra_module_paths.append(filepath)
        except (UnicodeDecodeError, IOError) as e:
            # Probably a binary file; permission error or race cond. because file got deleted
            # ignore
            debug.warning(unicode(e))
            continue
    return extra_module_paths

def is_string(value):
    if value.inference_state.environment.version_info.major == 2:
        str_classes = (unicode, bytes)
    else:
        str_classes = (unicode,)
    return value.is_compiled() and isinstance(value.get_safe_value(default=None), str_classes)

def _get_module(self):
        cache.invalidate_star_import_cache(self._path)
        parser = FastParser(self._grammar, self._source, self.path)
        save_parser(self.path, parser, pickling=False)

        module = self._evaluator.wrap(parser.module)
        imports.add_module(self._evaluator, unicode(module.name), module)
        return parser.module

def description(self):
        """Provide a description of the completion object."""
        if self._definition is None:
            return ''
        t = self.type
        if t == 'statement' or t == 'import':
            desc = self._definition.get_code()
        else:
            desc = '.'.join(unicode(p) for p in self._path())

        line = '' if self.in_builtin_module else '@%s' % self.line
        return '%s: %s%s' % (t, desc, line)