On 24/04/2014 10:41, Alan Gauld wrote:
On 24/04/14 00:14, Martin wrote:

If I run from a command prompt, however, I get

C:\Users\Martin\Documents\College\python>python pickle.py

You have called your file pickle.py.
So when you try to import pickle the interpreter sees your file first and imports that not the library pickle.

Never name your files the same as modules in the standard
library, or at least not the same as something you import.

     pickle.dump(contents,file2,True)
AttributeError: 'module' object has no attribute 'dump'


I get the opposite problem with themsvcrt.getch() function.  It works OK
when run from a command prompt, but under IDLE it returns immediately
without waiting for a key-press, with value b'\xff'.  Is this just a
feature of the IDLE?

I'd never noticed that particular quirk before but you are correct. I get the same behaviour on win8.1 with Python 3.3. I also get the same behaviour using Pythonwin (which is generally a much better IDE if you are on Windows BTW!)

I'm not sure why they behave differently to the command line but most IDEs have slight oddities like this. If in doubt use the command line version as your reference.

HTH
Many thanks for the advice about file names. I was having great fun (or Python was having fun with me) trying to run a very simple program with the file name dictionary.py but sanity returned when I renamed it dictionery.py




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