When is logging.getLogger(__name__) needed?

[Loris Bennett]

Peter Otten <__peter__ at web.de> writes:

> On 31/03/2023 15:01, Loris Bennett wrote:
[snip (53 lines)]

> Your problem has nothing to do with logging -- it's about visibility
> ("scope") of names:
>
>>>> def use_name():
> 	print(name)
>
>
>>>> def define_name():
> 	name = "Loris"
>
>
>>>> use_name()
> Traceback (most recent call last):
>   File "<pyshell#56>", line 1, in <module>
>     use_name()
>   File "<pyshell#52>", line 2, in use_name
>     print(name)
> NameError: name 'name' is not defined
>
> Binding (=assigning to) a name inside a function makes it local to that
> function. If you want a global (module-level) name you have to say so:
>
>>>> def define_name():
> 	global name
> 	name = "Peter"
>
>
>>>> define_name()
>>>> use_name()
> Peter

Thanks for the example and reminding me about Python's scopes.

With

    global name

    def use_name():
        print(name)

    def define_name():
        name = "Peter"

    define_name()
    use_name()

I was initially surprised by the following error:

    ~/tmp $ python3 global.py 
    Traceback (most recent call last):
      File "/home/loris/tmp/global.py", line 10, in <module>
        use_name()
      File "/home/loris/tmp/global.py", line 4, in use_name
        print(name)
    NameError: name 'name' is not defined

but I was misinterpreting 

  global name

to mean

  define a global variable 'name'

whereas it actually seems to mean more like

  use the global variable 'name'

Correct?

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