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]) 2.8 (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]) 2.8 -- https://mail.python.org/mailman/listinfo/python-list
