Problem to calculate the mean in version 3.4
__peter__ at web.de
Fri Sep 25 09:09:16 CEST 2015
Michel Guirguis wrote:
> I have downloaded the version 3.4 and I have a problem to calculate the
> mean. The software does not recognise the function mean(). I am getting
> the following error.
>>>> mean([1, 2, 3, 4, 4])
> Traceback (most recent call last):
> File "<pyshell#4>", line 1, in <module>
> mean([1, 2, 3, 4, 4])
> NameError: name 'mean' is not defined
> Could you please help. Is it possible to send me the version that
> calculate statistics.
The help for the statistics and other modules assumes basic knowledge of
Python. I recommend you read the tutorial or any other introductory text on
Python before you proceed.
Regarding your actual question: before you can use a function you have to
import it. There are two ways:
(1) Recommended: import the module and use the qualified name:
>>> import statistics
>>> statistics.mean([1, 2, 3, 4, 4])
(2) Import the function. Typically done when you want to use it in the
interactive interpreter, not in a script.
>>> from statistics import mean
>>> mean([1, 2, 3, 4, 4])
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