A function equivalent to the str.isidentifier method on Py3
978255
def isidentifier(s, dotted=False):
    '''
    
    '''
    if dotted:
        return all(isidentifier(a) for a in s.split('.'))
    if PY3:
        return s.isidentifier()
    else:
        import re
        _name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*$")
        return bool(_name_re.match(s))
584230
def is_builtin_function(id_node):  # type: (Dict[str, Any]) -> bool
    
    # Builtin functions are always IDENTIFIER.
    if NodeType(id_node['type']) is not NodeType.IDENTIFIER:
        return False

    id_value = id_node['value']

    if not is_function_identifier(id_node):
        return False

    # There are difference between a function identifier and variable
    # identifier:
    #
    #   let localtime = 0
    #   echo localtime " => 0
    #   echo localtime() " => 1420011455
    return id_value in BuiltinFunctions
704089
void scanIdentifier() {
        if (!eof) {
            StringBuilder identBuf = new StringBuilder(32);
            if (!isStopSymbol(symbol)) {
                identBuf.append(symbol);
                do {
                    char ch = buffer[pos];
                    if ((ch >= 'a') && (ch <= 'z') || (ch >= 'A') && (ch <= 'Z')
                            || !isStopSymbol(ch)) {
                        identBuf.append(ch);
                        pos++;
                    } else {
                        identifier = identBuf.toString();
                        scanSymbol();
                        return;
                    }
                } while (pos != buffer.length);
                identifier = identBuf.toString();
                symbol = 0;
                eof = true;
            } else {
                // Ident starts with incorrect char.
                symbol = 0;
                eof = true;
                throw new GenericSignatureFormatError();
            }
        } else {
            throw new GenericSignatureFormatError();
        }
    }
690261
def parse(self, ident_str):
        # type: (bytes) -> None
        '''
        
        '''
        if self._initialized:
            raise pycdlibexception.PyCdlibInternalError('This File or Text identifier is already initialized')
        self.text = ident_str

        # FIXME: we do not support a file identifier here.  In the future, we
        # might want to implement this.

        self._initialized = True
1263056
def is_cython_function(fn):
    """"""
    if hasattr(fn, "__func__"):
        fn = fn.__func__  # Class method, static method
    name = type(fn).__name__
    return (
        name == "method_descriptor"
        or name == "cython_function_or_method"
        or name == "builtin_function_or_method"
    )
437390
def _make_identifier(string):
        """"""
        string = re.sub(r"[ \-+/\\*%&$£#@.,;:'" "?<>]", "_", string)
        if re.match(r"^\d", string):
            string = "a_{0}".format(string)
        return string
166027
def is_defined(self, objtxt, force_import=False):
        """"""
        return self.interpreter.is_defined(objtxt, force_import)
680299
def is_valid(cls, arg):
        
        return (isinstance(arg, (int, long)) and (arg >= 0)) or \
            isinstance(arg, str)
34020
def _is_reference(arg):
    '''
    
    '''
    return isinstance(arg, dict) and len(arg) == 1 and isinstance(next(six.itervalues(arg)), six.string_types)
496052
def p_identifier(self, tree):
        '''  '''
        tree.value = tree.attr
        tree.svalue = tree.attr
427183
def is_integer(obj):
    
    if PYTHON3:
        return isinstance(obj, int)
    return isinstance(obj, (int, long))
413339
def is_defined(self, objtxt, force_import=False):
        """"""
        return isdefined(objtxt, force_import=force_import,
                         namespace=self.locals)
277729
def is_python3_identifier(possible_identifier):
    
    possible_identifier = unicodedata.normalize('NFKC', possible_identifier)
    return (
        bool(possible_identifier) and
        _is_in_id_start(possible_identifier[0]) and
        all(map(_is_in_id_continue, possible_identifier[1:]))
    ) and not iskeyword(possible_identifier)
1003244
def ok_kwarg(val):
        """"""

        import keyword

        try:
            return str.isidentifier(val) and not keyword.iskeyword(val)
        except TypeError:
            # Non-string values are never a valid keyword arg
            return False
1288751
def is_identifier(self, is_identifier):
        

        if is_identifier:
            self.is_editable = False

        self._is_identifier = is_identifier
693871
function isIdentifierPart(ch) {
      // Generated by `tools/generate-identifier-regex.js`.
      var NonAsciiIdentifierPartOnly = /[0-9_\xB7\u0300-\u036F\u0387\u0483-\u0487\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u0610-\u061A\u064B-\u0669\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7\u06E8\u06EA-\u06ED\u06F0-\u06F9\u0711\u0730-\u074A\u07A6-\u07B0\u07C0-\u07C9\u07EB-\u07F3\u07FD\u0816-\u0819\u081B-\u0823\u0825-\u0827\u0829-\u082D\u0859-\u085B\u08D3-\u08E1\u08E3-\u0903\u093A-\u093C\u093E-\u094F\u0951-\u0957\u0962\u0963\u0966-\u096F\u0981-\u0983\u09BC\u09BE-\u09C4\u09C7\u09C8\u09CB-\u09CD\u09D7\u09E2\u09E3\u09E6-\u09EF\u09FE\u0A01-\u0A03\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A66-\u0A71\u0A75\u0A81-\u0A83\u0ABC\u0ABE-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AE2\u0AE3\u0AE6-\u0AEF\u0AFA-\u0AFF\u0B01-\u0B03\u0B3C\u0B3E-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B62\u0B63\u0B66-\u0B6F\u0B82\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD7\u0BE6-\u0BEF\u0C00-\u0C04\u0C3E-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C62\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0CBC\u0CBE-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CE2\u0CE3\u0CE6-\u0CEF\u0D00-\u0D03\u0D3B\u0D3C\u0D3E-\u0D44\u0D46-\u0D48\u0D4A-\u0D4D\u0D57\u0D62\u0D63\u0D66-\u0D6F\u0D82\u0D83\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E31\u0E34-\u0E3A\u0E47-\u0E4E\u0E50-\u0E59\u0EB1\u0EB4-\u0EB9\u0EBB\u0EBC\u0EC8-\u0ECD\u0ED0-\u0ED9\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E\u0F3F\u0F71-\u0F84\u0F86\u0F87\u0F8D-\u0F97\u0F99-\u0FBC\u0FC6\u102B-\u103E\u1040-\u1049\u1056-\u1059\u105E-\u1060\u1062-\u1064\u1067-\u106D\u1071-\u1074\u1082-\u108D\u108F-\u109D\u135D-\u135F\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17B4-\u17D3\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u18A9\u1920-\u192B\u1930-\u193B\u1946-\u194F\u19D0-\u19DA\u1A17-\u1A1B\u1A55-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AB0-\u1ABD\u1B00-\u1B04\u1B34-\u1B44\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1B82\u1BA1-\u1BAD\u1BB0-\u1BB9\u1BE6-\u1BF3\u1C24-\u1C37\u1C40-\u1C49\u1C50-\u1C59\u1CD0-\u1CD2\u1CD4-\u1CE8\u1CED\u1CF2-\u1CF4\u1CF7-\u1CF9\u1DC0-\u1DF9\u1DFB-\u1DFF\u200C\u200D\u203F\u2040\u2054\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2CEF-\u2CF1\u2D7F\u2DE0-\u2DFF\u302A-\u302F\u3099\u309A\uA620-\uA629\uA66F\uA674-\uA67D\uA69E\uA69F\uA6F0\uA6F1\uA802\uA806\uA80B\uA823-\uA827\uA880\uA881\uA8B4-\uA8C5\uA8D0-\uA8D9\uA8E0-\uA8F1\uA8FF-\uA909\uA926-\uA92D\uA947-\uA953\uA980-\uA983\uA9B3-\uA9C0\uA9D0-\uA9D9\uA9E5\uA9F0-\uA9F9\uAA29-\uAA36\uAA43\uAA4C\uAA4D\uAA50-\uAA59\uAA7B-\uAA7D\uAAB0\uAAB2-\uAAB4\uAAB7\uAAB8\uAABE\uAABF\uAAC1\uAAEB-\uAAEF\uAAF5\uAAF6\uABE3-\uABEA\uABEC\uABED\uABF0-\uABF9\uFB1E\uFE00-\uFE0F\uFE20-\uFE2F\uFE33\uFE34\uFE4D-\uFE4F\uFF10-\uFF19\uFF3F]|\uD800[\uDDFD\uDEE0\uDF76-\uDF7A]|\uD801[\uDCA0-\uDCA9]|\uD802[\uDE01-\uDE03\uDE05\uDE06\uDE0C-\uDE0F\uDE38-\uDE3A\uDE3F\uDEE5\uDEE6]|\uD803[\uDD24-\uDD27\uDD30-\uDD39\uDF46-\uDF50]|\uD804[\uDC00-\uDC02\uDC38-\uDC46\uDC66-\uDC6F\uDC7F-\uDC82\uDCB0-\uDCBA\uDCF0-\uDCF9\uDD00-\uDD02\uDD27-\uDD34\uDD36-\uDD3F\uDD45\uDD46\uDD73\uDD80-\uDD82\uDDB3-\uDDC0\uDDC9-\uDDCC\uDDD0-\uDDD9\uDE2C-\uDE37\uDE3E\uDEDF-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF3B\uDF3C\uDF3E-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF57\uDF62\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC35-\uDC46\uDC50-\uDC59\uDC5E\uDCB0-\uDCC3\uDCD0-\uDCD9\uDDAF-\uDDB5\uDDB8-\uDDC0\uDDDC\uDDDD\uDE30-\uDE40\uDE50-\uDE59\uDEAB-\uDEB7\uDEC0-\uDEC9\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDC2C-\uDC3A\uDCE0-\uDCE9\uDE01-\uDE0A\uDE33-\uDE39\uDE3B-\uDE3E\uDE47\uDE51-\uDE5B\uDE8A-\uDE99]|\uD807[\uDC2F-\uDC36\uDC38-\uDC3F\uDC50-\uDC59\uDC92-\uDCA7\uDCA9-\uDCB6\uDD31-\uDD36\uDD3A\uDD3C\uDD3D\uDD3F-\uDD45\uDD47\uDD50-\uDD59\uDD8A-\uDD8E\uDD90\uDD91\uDD93-\uDD97\uDDA0-\uDDA9\uDEF3-\uDEF6]|\uD81A[\uDE60-\uDE69\uDEF0-\uDEF4\uDF30-\uDF36\uDF50-\uDF59]|\uD81B[\uDF51-\uDF7E\uDF8F-\uDF92]|\uD82F[\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD838[\uDC00-\uDC06\uDC08-\uDC18\uDC1B-\uDC21\uDC23\uDC24\uDC26-\uDC2A]|\uD83A[\uDCD0-\uDCD6\uDD44-\uDD4A\uDD50-\uDD59]|\uDB40[\uDD00-\uDDEF]/;

      return isIdentifierStart(ch) ||
        (ch >= 48 && ch <= 57) ||         // 0..9
        ((ch >= 0x80) && NonAsciiIdentifierPartOnly.test(fromCodePoint(ch)));
    }
759206
def _function_signature(func):
    
    if sys.version_info.major > 2:
        # Python 3 already implements this functionality
        return func.__name__ + str(inspect.signature(func))

    # In Python 2 we have to do it manually, unfortunately
    spec = inspect.getargspec(func)
    posargs = spec.args
    defaults = spec.defaults if spec.defaults is not None else []
    varargs = spec.varargs
    kwargs = spec.keywords
    deflen = 0 if defaults is None else len(defaults)
    nodeflen = 0 if posargs is None else len(posargs) - deflen

    args = ['{}'.format(arg) for arg in posargs[:nodeflen]]
    args.extend('{}={}'.format(arg, dval)
                for arg, dval in zip(posargs[nodeflen:], defaults))
    if varargs:
        args.append('*{}'.format(varargs))
    if kwargs:
        args.append('**{}'.format(kwargs))

    argstr = ', '.join(args)

    return '{}({})'.format(func.__name__, argstr)