From Newsgroup: comp.lang.python

Dear Sirs.
The statement 'global', indicating variables living in the global scope, is very suitable to be used in modules. I'm wondering whether in scripts, running at the top-level invocation of the interpreter, statement 'global' is used exactly the same way as in modules? If there are any differences, I would really appreciate any comments on this.
Regards,
Dmitry Popov
Lemont, IL
USA
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From Newsgroup: comp.lang.python

On 8/05/24 1:32 pm, Popov, Dmitry Yu wrote:

The statement 'global', indicating variables living in the global scope, is very suitable to be used in modules. I'm wondering whether in scripts, running at the top-level invocation of the interpreter, statement 'global' is used exactly the same way as in modules?

The 'global' statement declares a name to be module-level, so there's no
reason to use it at the top level of either a script or a module, since everything there is module-level anyway.

You only need it if you want to assign to a module-level name from
within a function, e.g.

spam = 17

def f():
global spam
spam = 42

f()
# spam is now 42

A script is a module, so everything that applies to modules also
applies to scripts.
--
Greg
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From Newsgroup: comp.lang.python

Thank you!
________________________________
From: Python-list <python-list-bounces+dpopov=[email protected]> on behalf of Greg Ewing via Python-list <[email protected]>
Sent: Wednesday, May 8, 2024 3:56 AM
To: [email protected] <[email protected]>
Subject: Re: Use of statement 'global' in scripts.

On 8/05/24 1: 32 pm, Popov, Dmitry Yu wrote: > The statement 'global', indicating variables living in the global scope, is very suitable to be used in modules. I'm wondering whether in scripts, running at the top-level invocation of the interpreter,
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On 8/05/24 1:32 pm, Popov, Dmitry Yu wrote:

The statement 'global', indicating variables living in the global scope, is very suitable to be used in modules. I'm wondering whether in scripts, running at the top-level invocation of the interpreter, statement 'global' is used exactly the same way as in modules?

The 'global' statement declares a name to be module-level, so there's no
reason to use it at the top level of either a script or a module, since everything there is module-level anyway.

You only need it if you want to assign to a module-level name from
within a function, e.g.

spam = 17

def f():
global spam
spam = 42

f()
# spam is now 42

A script is a module, so everything that applies to modules also
applies to scripts.

--
Greg
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