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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
import sys
try:
reversed = reversed
except NameError:
def reversed(sequence):
"""reversed(sequence) -> reverse iterator over values of the sequence
Return a reverse iterator
"""
if hasattr(sequence, '__reversed__'):
return sequence.__reversed__()
if not hasattr(sequence, '__getitem__'):
raise TypeError("argument to reversed() must be a sequence")
return reversed_iterator(sequence)
class reversed_iterator(object):
def __init__(self, seq):
self.seq = seq
self.remaining = len(seq)
def __iter__(self):
return self
def next(self):
i = self.remaining
if i > 0:
i -= 1
item = self.seq[i]
self.remaining = i
return item
raise StopIteration
def __length_hint__(self):
return self.remaining
try:
any = any
except NameError:
def any(iterable):
for x in iterable:
if x:
return True
return False
try:
all = all
except NameError:
def all(iterable):
for x in iterable:
if not x:
return False
return True
try:
sorted = sorted
except NameError:
builtin_cmp = cmp # need to use cmp as keyword arg
def sorted(iterable, cmp=None, key=None, reverse=0):
use_cmp = None
if key is not None:
if cmp is None:
def use_cmp(x, y):
return builtin_cmp(x[0], y[0])
else:
def use_cmp(x, y):
return cmp(x[0], y[0])
l = [(key(element), element) for element in iterable]
else:
if cmp is not None:
use_cmp = cmp
l = list(iterable)
if use_cmp is not None:
l.sort(use_cmp)
else:
l.sort()
if reverse:
l.reverse()
if key is not None:
return [element for (_, element) in l]
return l
try:
set, frozenset = set, frozenset
except NameError:
from sets import set, frozenset
# pass through
enumerate = enumerate
try:
BaseException = BaseException
except NameError:
BaseException = Exception
try:
GeneratorExit = GeneratorExit
except NameError:
class GeneratorExit(Exception):
""" This exception is never raised, it is there to make it possible to
write code compatible with CPython 2.5 even in lower CPython
versions."""
pass
GeneratorExit.__module__ = 'exceptions'
_sysex = (KeyboardInterrupt, SystemExit, MemoryError, GeneratorExit)
try:
callable = callable
except NameError:
def callable(obj):
return hasattr(obj, "__call__")
if sys.version_info >= (3, 0):
exec ("print_ = print ; exec_=exec")
import builtins
# some backward compatibility helpers
_basestring = str
def _totext(obj, encoding=None, errors=None):
if isinstance(obj, bytes):
if errors is None:
obj = obj.decode(encoding)
else:
obj = obj.decode(encoding, errors)
elif not isinstance(obj, str):
obj = str(obj)
return obj
def _isbytes(x):
return isinstance(x, bytes)
def _istext(x):
return isinstance(x, str)
text = str
bytes = bytes
def _getimself(function):
return getattr(function, '__self__', None)
def _getfuncdict(function):
return getattr(function, "__dict__", None)
def _getcode(function):
return getattr(function, "__code__", None)
def execfile(fn, globs=None, locs=None):
if globs is None:
back = sys._getframe(1)
globs = back.f_globals
locs = back.f_locals
del back
elif locs is None:
locs = globs
fp = open(fn, "r")
try:
source = fp.read()
finally:
fp.close()
co = compile(source, fn, "exec", dont_inherit=True)
exec_(co, globs, locs)
else:
import __builtin__ as builtins
_totext = unicode
_basestring = basestring
text = unicode
bytes = str
execfile = execfile
callable = callable
def _isbytes(x):
return isinstance(x, str)
def _istext(x):
return isinstance(x, unicode)
def _getimself(function):
return getattr(function, 'im_self', None)
def _getfuncdict(function):
return getattr(function, "__dict__", None)
def _getcode(function):
try:
return getattr(function, "__code__")
except AttributeError:
return getattr(function, "func_code", None)
def print_(*args, **kwargs):
""" minimal backport of py3k print statement. """
sep = ' '
if 'sep' in kwargs:
sep = kwargs.pop('sep')
end = '\n'
if 'end' in kwargs:
end = kwargs.pop('end')
file = 'file' in kwargs and kwargs.pop('file') or sys.stdout
if kwargs:
args = ", ".join([str(x) for x in kwargs])
raise TypeError("invalid keyword arguments: %s" % args)
at_start = True
for x in args:
if not at_start:
file.write(sep)
file.write(str(x))
at_start = False
file.write(end)
def exec_(obj, globals=None, locals=None):
""" minimal backport of py3k exec statement. """
__tracebackhide__ = True
if globals is None:
frame = sys._getframe(1)
globals = frame.f_globals
if locals is None:
locals = frame.f_locals
elif locals is None:
locals = globals
exec2(obj, globals, locals)
if sys.version_info >= (3, 0):
def _reraise(cls, val, tb):
__tracebackhide__ = True
assert hasattr(val, '__traceback__')
raise cls.with_traceback(val, tb)
else:
exec ("""
def _reraise(cls, val, tb):
__tracebackhide__ = True
raise cls, val, tb
def exec2(obj, globals, locals):
__tracebackhide__ = True
exec obj in globals, locals
""")
def _tryimport(*names):
""" return the first successfully imported module. """
assert names
for name in names:
try:
__import__(name)
except ImportError:
excinfo = sys.exc_info()
else:
return sys.modules[name]
_reraise(*excinfo)
|
