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
|
# -*- coding: utf-8 -*-
from numpy import ndarray, bool_
def eq(a, b):
""" The great missing equivalence function: Guaranteed evaluation
to a single bool value.
"""
if a is b:
return True
if a is None or b is None:
return True if a is None and b is None else False
try:
e = a == b
except ValueError:
return False
except AttributeError:
return False
except Exception:
print("a:", str(type(a)), str(a))
print("b:", str(type(b)), str(b))
raise
t = type(e)
if t is bool:
return e
elif t is bool_:
return bool(e)
elif isinstance(e, ndarray):
try:
# disaster: if a is empty and b is not, then e.all() is True
if a.shape != b.shape:
return False
except Exception:
return False
if (hasattr(e, 'implements') and e.implements('MetaArray')):
return e.asarray().all()
else:
return e.all()
else:
raise Exception("== operator returned type %s" % str(type(e)))
|
