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+--- Thread: User-defined function to reset variables? (/thread-37302.html)
User-defined function to reset variables? - Mark17 - May-25-2022
Hi all,
A general outline of my program could be written as something like this:
Variable initiation (reset)
Control branch A
if...
elif...
elif...
else...
...
Variable reset
Control branch B
if...
elif...
else...
...
Variable resetVariable initiation and reset simply assign particular variables to 0, empty lists, etc. Because it's done in multiple places, I'm thinking about creating a user-defined function where the variables common to all three places are reset to 0.If I were to do such a thing, how would I handle variable scope? The variables reset in the function need to be available throughout the main program.
Finally, do you think this is even worth doing?
I have ~50 variables in this program and maybe 30 would be reset as part of the function.
RE: User-defined function to reset variables? - Gribouillis - May-25-2022
(May-25-2022, 02:31 PM)Mark17 Wrote: I'm thinking about creating a user-defined function where the variables common to all three places are reset to 0.This is why classes were invented: to group in a single entity variables shared by different places. So create a class (or several classes) to hold the variables
class Foo:
def __init__(self):
self.reset()
def reset(self):
self.baz = 10
self.bar = 'hello'
self.spam = 3.14159
foo = Foo()
...
...
if ...:
...
foo.reset()
RE: User-defined function to reset variables? - Mark17 - May-25-2022
(May-25-2022, 03:05 PM)Gribouillis Wrote: This is why classes were invented: to group in a single entity variables shared by different places. So create a class (or several classes) to hold the variables
I've studied some intro stuff about classes, but they really confuse me (along with all the syntax like the __init__, the self, etc.). Can you explain this in a simpler way? If I clearly understand their place and am convinced it's worth doing, then I'll force myself through it and figure it out.
RE: User-defined function to reset variables? - Gribouillis - May-25-2022
(May-25-2022, 07:14 PM)Mark17 Wrote: If I clearly understand their place and am convinced it's worth doingDecades of progress in programming and generations of top-level engineers tell you it's worth doing. There is absolutely no reason to hesitate: learn classes as soon as possible. Start with chapter 9 of the official Python Tutorial for an introduction.