Question about import
Tim Rowe
tim at remove_if_not_spam.digitig.co.uk
Tue Aug 5 12:48:50 EDT 2003
On 5 Aug 2003 09:28:54 -0700, kjmacken at yorku.ca (Kevin MacKenzie)
wrote:
>I'm a complete newbie to using Python. I have a small question about
>importing modules.
>
>Is there any difference between the two following statements, and what
>(if any) are they?
>
>>>> from Module import *
>
>
>and
>
>>>> import Module
Yes. As I said to someone else hereabouts not all /that/ long ago
(!),
>>>> import Module
is the computing equivalent to getting your toolkit out of the
cupboard and putting it on your workbench.
>>>> from Module import *
is the computing equivalent of getting your toolkit out of the
cupboard, tipping the contents onto the workbench, and putting the box
back into the cupboard.
If "Module" contains "foo()",
>>>> import Module
means that you can call Module.foo()
>>>> from Module import *
means that you can use foo(). But if your code or any other module
contains something called "foo()" then you get a name clash. That can
be nasty, because you can get everything working fine, and somebody
using a library that's supposed to be compatable with the one you've
tested finds it doesn't work.
For all but the very simplest of code, use
>>>> import Module
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