{{ message }}
-
-
Notifications
You must be signed in to change notification settings - Fork 35.4k
Expand file tree
/
Copy pathoperator.py
More file actions
475 lines (387 loc) · 10.9 KB
/
Copy pathoperator.py
File metadata and controls
475 lines (387 loc) · 10.9 KB
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
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
"""
Operator Interface
This module exports a set of functions corresponding to the intrinsic
operators of Python. For example, operator.add(x, y) is equivalent
to the expression x+y. The function names are those used for special
methods; variants without leading and trailing '__' are also provided
for convenience.
This is the pure Python implementation of the module.
"""
__all__ = ['abs', 'add', 'and_', 'attrgetter', 'call', 'concat', 'contains', 'countOf',
'delitem', 'eq', 'floordiv', 'ge', 'getitem', 'gt', 'iadd', 'iand',
'iconcat', 'ifloordiv', 'ilshift', 'imatmul', 'imod', 'imul',
'index', 'indexOf', 'inv', 'invert', 'ior', 'ipow', 'irshift',
'is_', 'is_none', 'is_not', 'is_not_none', 'isub', 'itemgetter', 'itruediv',
'ixor', 'le', 'length_hint', 'lshift', 'lt', 'matmul', 'methodcaller', 'mod',
'mul', 'ne', 'neg', 'not_', 'or_', 'pos', 'pow', 'rshift',
'setitem', 'sub', 'truediv', 'truth', 'xor']
from builtins import abs as _abs
# Comparison Operations *******************************************************#
def lt(a, b):
"Same as a < b."
return a < b
def le(a, b):
"Same as a <= b."
return a <= b
def eq(a, b):
"Same as a == b."
return a == b
def ne(a, b):
"Same as a != b."
return a != b
def ge(a, b):
"Same as a >= b."
return a >= b
def gt(a, b):
"Same as a > b."
return a > b
# Logical Operations **********************************************************#
def not_(a):
"Same as not a."
return not a
def truth(a):
"Return True if a is true, False otherwise."
return True if a else False
def is_(a, b):
"Same as a is b."
return a is b
def is_not(a, b):
"Same as a is not b."
return a is not b
def is_none(a):
"Same as a is None."
return a is None
def is_not_none(a):
"Same as a is not None."
return a is not None
# Mathematical/Bitwise Operations *********************************************#
def abs(a):
"Same as abs(a)."
return _abs(a)
def add(a, b):
"Same as a + b."
return a + b
def and_(a, b):
"Same as a & b."
return a & b
def floordiv(a, b):
"Same as a // b."
return a // b
def index(a):
"Same as a.__index__()."
return a.__index__()
def inv(a):
"Same as ~a."
return ~a
invert = inv
def lshift(a, b):
"Same as a << b."
return a << b
def mod(a, b):
"Same as a % b."
return a % b
def mul(a, b):
"Same as a * b."
return a * b
def matmul(a, b):
"Same as a @ b."
return a @ b
def neg(a):
"Same as -a."
return -a
def or_(a, b):
"Same as a | b."
return a | b
def pos(a):
"Same as +a."
return +a
def pow(a, b):
"Same as a ** b."
return a ** b
def rshift(a, b):
"Same as a >> b."
return a >> b
def sub(a, b):
"Same as a - b."
return a - b
def truediv(a, b):
"Same as a / b."
return a / b
def xor(a, b):
"Same as a ^ b."
return a ^ b
# Sequence Operations *********************************************************#
def concat(a, b):
"Same as a + b, for a and b sequences."
if not hasattr(a, '__getitem__'):
msg = "'%s' object can't be concatenated" % type(a).__name__
raise TypeError(msg)
return a + b
def contains(a, b):
"Same as b in a (note reversed operands)."
return b in a
def countOf(a, b):
"Return the number of items in a which are, or which equal, b."
count = 0
for i in a:
if i is b or i == b:
count += 1
return count
def delitem(a, b):
"Same as del a[b]."
del a[b]
def getitem(a, b):
"Same as a[b]."
return a[b]
def indexOf(a, b):
"Return the first index of b in a."
for i, j in enumerate(a):
if j is b or j == b:
return i
else:
raise ValueError('sequence.index(x): x not in sequence')
def setitem(a, b, c):
"Same as a[b] = c."
a[b] = c
def length_hint(obj, default=0):
"""
Return an estimate of the number of items in obj.
This is useful for presizing containers when building from an iterable.
If the object supports len(), the result will be exact. Otherwise, it may
over- or under-estimate by an arbitrary amount. The result will be an
integer >= 0.
"""
if not isinstance(default, int):
msg = ("'%s' object cannot be interpreted as an integer" %
type(default).__name__)
raise TypeError(msg)
try:
return len(obj)
except TypeError:
pass
try:
hint = type(obj).__length_hint__
except AttributeError:
return default
try:
val = hint(obj)
except TypeError:
return default
if val is NotImplemented:
return default
if not isinstance(val, int):
msg = ('__length_hint__ must be integer, not %s' %
type(val).__name__)
raise TypeError(msg)
if val < 0:
msg = '__length_hint__() should return >= 0'
raise ValueError(msg)
return val
# Other Operations ************************************************************#
def call(obj, /, *args, **kwargs):
"""Same as obj(*args, **kwargs)."""
return obj(*args, **kwargs)
# Generalized Lookup Objects **************************************************#
class attrgetter:
"""
Return a callable object that fetches the given attribute(s) from its operand.
After f = attrgetter('name'), the call f(r) returns r.name.
After g = attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).
After h = attrgetter('name.first', 'name.last'), the call h(r) returns
(r.name.first, r.name.last).
"""
__slots__ = ('_attrs', '_call')
def __init__(self, attr, /, *attrs):
if not attrs:
if not isinstance(attr, str):
raise TypeError('attribute name must be a string')
self._attrs = (attr,)
names = attr.split('.')
def func(obj):
for name in names:
obj = getattr(obj, name)
return obj
self._call = func
else:
self._attrs = (attr,) + attrs
getters = tuple(map(attrgetter, self._attrs))
def func(obj):
return tuple(getter(obj) for getter in getters)
self._call = func
def __call__(self, obj, /):
return self._call(obj)
def __repr__(self):
return '%s.%s(%s)' % (self.__class__.__module__,
self.__class__.__qualname__,
', '.join(map(repr, self._attrs)))
def __reduce__(self):
return self.__class__, self._attrs
class itemgetter:
"""
Return a callable object that fetches the given item(s) from its operand.
After f = itemgetter(2), the call f(r) returns r[2].
After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])
"""
__slots__ = ('_items', '_call')
def __init__(self, item, /, *items):
if not items:
self._items = (item,)
def func(obj):
return obj[item]
self._call = func
else:
self._items = items = (item,) + items
def func(obj):
return tuple(obj[i] for i in items)
self._call = func
def __call__(self, obj, /):
return self._call(obj)
def __repr__(self):
return '%s.%s(%s)' % (self.__class__.__module__,
self.__class__.__name__,
', '.join(map(repr, self._items)))
def __reduce__(self):
return self.__class__, self._items
class methodcaller:
"""
Return a callable object that calls the given method on its operand.
After f = methodcaller('name'), the call f(r) returns r.name().
After g = methodcaller('name', 'date', foo=1), the call g(r) returns
r.name('date', foo=1).
"""
__slots__ = ('_name', '_args', '_kwargs')
def __init__(self, name, /, *args, **kwargs):
self._name = name
if not isinstance(self._name, str):
raise TypeError('method name must be a string')
self._args = args
self._kwargs = kwargs
def __call__(self, obj, /):
return getattr(obj, self._name)(*self._args, **self._kwargs)
def __repr__(self):
args = [repr(self._name)]
args.extend(map(repr, self._args))
args.extend('%s=%r' % (k, v) for k, v in self._kwargs.items())
return '%s.%s(%s)' % (self.__class__.__module__,
self.__class__.__name__,
', '.join(args))
def __reduce__(self):
if not self._kwargs:
return self.__class__, (self._name,) + self._args
else:
from functools import partial
return partial(self.__class__, self._name, **self._kwargs), self._args
# In-place Operations *********************************************************#
def iadd(a, b):
"Same as a += b."
a += b
return a
def iand(a, b):
"Same as a &= b."
a &= b
return a
def iconcat(a, b):
"Same as a += b, for a and b sequences."
if not hasattr(a, '__getitem__'):
msg = "'%s' object can't be concatenated" % type(a).__name__
raise TypeError(msg)
a += b
return a
def ifloordiv(a, b):
"Same as a //= b."
a //= b
return a
def ilshift(a, b):
"Same as a <<= b."
a <<= b
return a
def imod(a, b):
"Same as a %= b."
a %= b
return a
def imul(a, b):
"Same as a *= b."
a *= b
return a
def imatmul(a, b):
"Same as a @= b."
a @= b
return a
def ior(a, b):
"Same as a |= b."
a |= b
return a
def ipow(a, b):
"Same as a **= b."
a **=b
return a
def irshift(a, b):
"Same as a >>= b."
a >>= b
return a
def isub(a, b):
"Same as a -= b."
a -= b
return a
def itruediv(a, b):
"Same as a /= b."
a /= b
return a
def ixor(a, b):
"Same as a ^= b."
a ^= b
return a
try:
from _operator import *
except ImportError:
pass
else:
from _operator import __doc__ # noqa: F401
# All of these "__func__ = func" assignments have to happen after importing
# from _operator to make sure they're set to the right function
__lt__ = lt
__le__ = le
__eq__ = eq
__ne__ = ne
__ge__ = ge
__gt__ = gt
__not__ = not_
__abs__ = abs
__add__ = add
__and__ = and_
__call__ = call
__floordiv__ = floordiv
__index__ = index
__inv__ = inv
__invert__ = invert
__lshift__ = lshift
__mod__ = mod
__mul__ = mul
__matmul__ = matmul
__neg__ = neg
__or__ = or_
__pos__ = pos
__pow__ = pow
__rshift__ = rshift
__sub__ = sub
__truediv__ = truediv
__xor__ = xor
__concat__ = concat
__contains__ = contains
__delitem__ = delitem
__getitem__ = getitem
__setitem__ = setitem
__iadd__ = iadd
__iand__ = iand
__iconcat__ = iconcat
__ifloordiv__ = ifloordiv
__ilshift__ = ilshift
__imod__ = imod
__imul__ = imul
__imatmul__ = imatmul
__ior__ = ior
__ipow__ = ipow
__irshift__ = irshift
__isub__ = isub
__itruediv__ = itruediv
__ixor__ = ixor
You can’t perform that action at this time.