[Python-ideas] Pass a function as the argument "step" of range()

[Pierre Quentel]

2015-07-03 0:01 GMT+02:00 Terry Reedy <tjreedy at udel.edu>:

> On 7/2/2015 4:20 PM, Pierre Quentel wrote:
>
>>
>> I agree that this is a blocking issue : as far as I know all Python
>> built-in functions return objects of a given type, regardless of its
>> arguments.
>>
>
> That is generally true.  But classes always return instances of the class
> when called, and range is a class, not a function.


>>> range
<class 'range'>
>>> class A(range):pass
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: type 'range' is not an acceptable base type
>>>

So yes, range is a class, but a strange one


>
>
> --
> Terry Jan Reedy
>
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