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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 json # noqa
import sys
import time
py3k = sys.version_info >= (3, 0)
py33 = sys.version_info >= (3, 3)
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")
if py3k:
# create a "getargspec" from getfullargspec(), which is not deprecated
# in Py3K; getargspec() has started to emit warnings as of Py3.5.
# As of Py3.4, now they are trying to move from getfullargspec()
# to "signature()", but getfullargspec() is not deprecated, so stick
# with that for now.
import collections
ArgSpec = collections.namedtuple(
"ArgSpec", ["args", "varargs", "keywords", "defaults"]
)
from inspect import getfullargspec as inspect_getfullargspec
def inspect_getargspec(func):
return ArgSpec(*inspect_getfullargspec(func)[0:4])
else:
from inspect import getargspec as inspect_getargspec # noqa
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 py33:
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]
try:
import threading
if py3k:
import _thread as thread
else:
import thread
except ImportError:
import dummy_threading as threading # noqa
if py3k:
import _dummy_thread as thread
else:
import dummy_thread as thread # noqa
if win32 or jython:
time_func = time.clock
else:
time_func = time.time
try:
from functools import partial
except:
def partial(func, *args, **keywords):
def newfunc(*fargs, **fkeywords):
newkeywords = keywords.copy()
newkeywords.update(fkeywords)
return func(*(args + fargs), **newkeywords)
return newfunc
all = all # noqa
def exception_name(exc):
return exc.__class__.__name__
try:
from inspect import CO_VARKEYWORDS, CO_VARARGS
def inspect_func_args(fn):
if py3k:
co = fn.__code__
else:
co = fn.func_code
nargs = co.co_argcount
names = co.co_varnames
args = list(names[:nargs])
varargs = None
if co.co_flags & CO_VARARGS:
varargs = co.co_varnames[nargs]
nargs = nargs + 1
varkw = None
if co.co_flags & CO_VARKEYWORDS:
varkw = co.co_varnames[nargs]
if py3k:
return args, varargs, varkw, fn.__defaults__
else:
return args, varargs, varkw, fn.func_defaults
except ImportError:
import inspect
def inspect_func_args(fn):
return inspect.getargspec(fn)
if py3k:
# TODO: this has been restored in py3k
def callable(fn): # noqa
return hasattr(fn, "__call__")
else:
callable = callable # noqa
################################################
# 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)
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