File: compat.py

package info (click to toggle)
mako 1.0.6%2Bds1-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 1,556 kB
  • ctags: 1,495
  • sloc: python: 11,807; makefile: 167
file content (201 lines) | stat: -rw-r--r-- 4,961 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
import sys
import time

py3k = sys.version_info >= (3, 0)
py33 = sys.version_info >= (3, 3)
py2k = sys.version_info < (3,)
py26 = sys.version_info >= (2, 6)
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
import json  # 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:
    def callable(fn):
        return hasattr(fn, '__call__')
else:
    callable = callable


################################################
# 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)