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# mako/compat.py # Copyright 2006-2019 the Mako authors and contributors <see AUTHORS file> # # This module is part of Mako and is released under # the MIT License: http://www.opensource.org/licenses/mit-license.php import collections import inspect import sys py3k = sys.version_info >= (3, 0) py2k = sys.version_info < (3,) py27 = sys.version_info >= (2, 7) jython = sys.platform.startswith("java") win32 = sys.platform.startswith("win") pypy = hasattr(sys, "pypy_version_info") ArgSpec = collections.namedtuple( "ArgSpec", ["args", "varargs", "keywords", "defaults"] ) def inspect_getargspec(func): """getargspec based on fully vendored getfullargspec from Python 3.3.""" if inspect.ismethod(func): func = func.__func__ if not inspect.isfunction(func): raise TypeError("{!r} is not a Python function".format(func)) co = func.__code__ if not inspect.iscode(co): raise TypeError("{!r} is not a code object".format(co)) nargs = co.co_argcount names = co.co_varnames nkwargs = co.co_kwonlyargcount if py3k else 0 args = list(names[:nargs]) nargs += nkwargs varargs = None if co.co_flags & inspect.CO_VARARGS: varargs = co.co_varnames[nargs] nargs = nargs + 1 varkw = None if co.co_flags & inspect.CO_VARKEYWORDS: varkw = co.co_varnames[nargs] return ArgSpec(args, varargs, varkw, func.__defaults__) if py3k: from io import StringIO import builtins as compat_builtins from urllib.parse import quote_plus, unquote_plus from html.entities import codepoint2name, name2codepoint string_types = (str,) binary_type = bytes text_type = str from io import BytesIO as byte_buffer def u(s): return s def b(s): return s.encode("latin-1") def octal(lit): return eval("0o" + lit) else: import __builtin__ as compat_builtins # noqa try: from cStringIO import StringIO except: from StringIO import StringIO byte_buffer = StringIO from urllib import quote_plus, unquote_plus # noqa from htmlentitydefs import codepoint2name, name2codepoint # noqa string_types = (basestring,) # noqa binary_type = str text_type = unicode # noqa def u(s): return unicode(s, "utf-8") # noqa def b(s): return s def octal(lit): return eval("0" + lit) if py3k: from importlib import machinery def load_module(module_id, path): return machinery.SourceFileLoader(module_id, path).load_module() else: import imp def load_module(module_id, path): fp = open(path, "rb") try: return imp.load_source(module_id, path, fp) finally: fp.close() if py3k: def reraise(tp, value, tb=None, cause=None): if cause is not None: value.__cause__ = cause if value.__traceback__ is not tb: raise value.with_traceback(tb) raise value else: exec( "def reraise(tp, value, tb=None, cause=None):\n" " raise tp, value, tb\n" ) def exception_as(): return sys.exc_info()[1] all = all # noqa def exception_name(exc): return exc.__class__.__name__ ################################################ # cross-compatible metaclass implementation # Copyright (c) 2010-2012 Benjamin Peterson def with_metaclass(meta, base=object): """Create a base class with a metaclass.""" return meta("%sBase" % meta.__name__, (base,), {}) ################################################ def arg_stringname(func_arg): """Gets the string name of a kwarg or vararg In Python3.4 a function's args are of _ast.arg type not _ast.name """ if hasattr(func_arg, "arg"): return func_arg.arg else: return str(func_arg)