Stef Mientki a écrit :
> Bruno Desthuilliers wrote:
>
>> Stef Mientki a écrit :
>>
>>> Bruno Desthuilliers wrote:
>>>
>>>> stef a écrit :
>>
>> (snip)
>>
>>>>> but tell them that they are going to loose all their globals ???
>>>>
>>>> It's a feature. Globals are definitively a BadThing(tm).
>>>
>>> yes, I know, but my audience will accept that only in the long term.
>>
>> Unless you clearly explain the benefits... Any code relying on the
>> existence of a global is:
>> 1/ dependent on the existence of this global
>> 2/ harder to understand
>
> And you think physicians will believe that ?
Aren't physicians supposed to be somewhat cartesians guys ? FWIW,
functional languages are mostly used by peoples with a strong
mathematical background...
> And suppose they believe it, are the willing to stop their research to
> rethink and rewrite their code ;-)
Not my problem. But anyway, if they really hope to get reliable results,
they'd better have bug-free programs, and using globals not only
potentially introduces subtle bugs, but also makes code hardly
unit-testable...
>>
>> FWIW, I'm currently fixing a simple Delphi program that's using quite
>> a few globals,
>
> Then it was certainly not written by a Delphi-guy ;-)
Yes it was. But that does not imply it was written by a competent
Delphi-guy !-)
(snip)
>>
>> # another.py
>> import myglobs
>> print myglobs.meaning_of_life
>>
>>>
>>> <all other py-files in the project>
>>> import Ugly_MatLab_Globals
>>>
>>> def some_function():
>>> import Ugly_MatLab_Globals
>>
>>
>> You don't have to reimport it here...
>
> Then I miss something:
Probably
> TEN = 10
> TWELVE = 12
> def some_function():
> global TEN
> TEN = 9
rebinds the 'global' (well... module) name 'TEN'.
> TWELVE = 11
creates a *local* name 'TWELVE' and bind it to integer 11.
> print TEN, TWELVE
>
> some_function() #will print 9,11
> print TEN, TWELVE #will print 9,12
>
> Or am I mistaken ?
You are.
[EMAIL PROTECTED] playground $ cat myglobals.py
a = None
b = None
[EMAIL PROTECTED] playground $ cat useglobals.py
import myglobals
def test():
myglobals.a = "meaning_of_life"
myglobals.b = 42
print "myglobals.a : ", myglobals.a
print "myglobals.b : ", myglobals.b
test()
print "myglobals.a : ", myglobals.a
print "myglobals.b : ", myglobals.b
[EMAIL PROTECTED] playground $ python useglobals.py
myglobals.a : None
myglobals.b : None
myglobals.a : meaning_of_life
myglobals.b : 42
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