[Python-3000] Weird error message from bytes type

[Delaney, Timothy (Tim)]

Greg Ewing wrote:

> Nick Coghlan wrote:
>> For example, simply
>> replacing 'index' with 'integer' could lead to a different kind of
>>   confusion: TypeError: 'float' object cannot be interpreted as an
>> integer 
> 
> Maybe something like
> 
>    TypeError: 'float' object cannot be used as an integer in this
> context 

Going back to the original proposal:

>>> x = b'a'
>>> x[0] = b'a'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'bytes' object cannot be used as an integer in this context

Not too bad. +1 as a default.

> Or maybe require the caller to pass in an error message
> format, or at least have a version of the call which
> allows that.

+1

>>> x = b'a'
>>> x[0] = b'a'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Cannot assign 'bytes' object to 'bytes' element

>>> x = b'a'
>>> x[0] = [1]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Cannot assign 'list' object to 'bytes' element

Tim Delaney