Noob alert: writing my first Python class library.
I have a straightforward class called Utility that lives in Utility.py.
I'm trying to get a handle on best practices for fleshing out a library. As
such, I've done the following for starters:
def __str__(self):
return str(type(self))
# def __eq__(self,other):
# return hash(self) == hash(other)
The commented-out method is what I'm questioning. As-is, I can do the
following from my test harness:
u = Utility()
print(str(u))
print(hash(u))
u2 = Utility()
print(hash(u2))
print(hash(u) == hash(u2))
However if I uncomment the above _eq_() implementation, I get the following
output:
<class 'Utility.Utility'>
Traceback (most recent call last):
File "/Users/bob/PycharmProjects/BGC/Tests.py", line 7, in <module>
print(hash(u))
TypeError: unhashable type: 'Utility'
Process finished with exit code 1
Obviously there is some sort of default implementation of __hash__() at work
and my implementation of _eq_() has somehow broken it. Can anyone explain
what's going on?
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