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Re: A question about import

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From: cs...@cskk.id.au (Cameron Simpson)
Newsgroups: comp.lang.python
Subject: Re: A question about import
Date: Sat, 17 Feb 2024 08:13:50 +1100
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by: Cameron Simpson - Fri, 16 Feb 2024 21:13 UTC

On 16Feb2024 20:32, MRAB <python@mrabarnett.plus.com> wrote:
>On 2024-02-16 20:07, Gabor Urban via Python-list wrote:
>>I need something about modules to be clarified.
>>
>>Suppose I have written a module eg: ModuleA which imports an other
>>module, let us say the datetime.
>>
>>If I import ModuleA in a script, will be datetime imported automatically?
>>
>Yes. When a module is imported it can import other modules.

But note that `datetime` does not magicly get put in the script's
namespace.

Module A:

import datetime

Script:

import A

In the code in module A the name datetime is known and can be used.

In the code in the script the name A is known and can be used. Importing
A does not magicly set the name datetime in the script's namespace -
imagine the the pollution!

You _can_ access it as A.datetime because it is in the A module's
namespace. But really if you just wanted datetime for direct use in the
script you would import it there too:

import datetime
import A

Note that the datetime module is only actually loaded once. The import
binds the name into your local namespace like any other variable.

Cheers,
Cameron Simpson <cs@cskk.id.au>

Subject	Author
Re: A question about import	Cameron Simpson