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Showing content from https://mail.python.org/pipermail/python-dev/2003-May/035592.html below:

[Python-Dev] Inplace multiply

[Python-Dev] Inplace multiply [Python-Dev] Inplace multiplyGuido van Rossum guido@python.org
Tue, 13 May 2003 13:44:37 -0400
> My "masked array" class MA has a problem that I don't know how to solve. The
> inplace multiply function
> 
>     def __imul__ (self, other)
> 
> is not getting called while my other input operations do work. The scenario
> is
> 
> x = MA.array(...)
> 
> x *= c
> 
> If c is an int, this works correctly, calling MA.__imul__. Otherwise, I get
> a message from the Python runtime saying it can't multiply a sequence by a
> non-int. But change MA to Numeric, it works.
> 
> Numeric is an extension type and MA is a (new style) class. MA defines
> __len__ as well as all the math operators.

We won't be able to help without seeing your code.

--Guido van Rossum (home page: http://www.python.org/~guido/)



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