[issue17309] __bytes__ doesn't work in subclass of int and str

[Terry J. Reedy]

Terry J. Reedy added the comment:

More data:

class myit(list):
    def __bytes__(self): return b'hello'
print (bytes(b'a'))

class myit(list):
    def __bytes__(self): return b'hello'
print (bytearray (myit([1,2,3])))

# bytearray(b'a')
# bytearray(b'\x01\x02\x03')

class by:
    def __bytes__(self): return b'hello'
# TypeError: 'by' object is not iterable
(Error message is incomplete.)

So bytearray *always* treats objects as specified in its library entry and 
never calls __bytes__, making its value sometimes unequal as a sequence of 
bytes from bytes with the same input.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17309>
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