Argument used as a part of variable name inside a function in Python

Question

I have following function:

def button_enter(self, event, type):
    if self.green_button_anim_on:
        return
    self.canvas.itemconfigure(self.green_button, image=self.green_button_image_hover)

This functions serves for the change of image of green button to "hover state" image when user hovers mouse over it. What I am trying to do - I want to use this function universally, not just for the green button, but also for the red button, quit button etc. So I decided to pass the argument type to the function that will have values like red, green, quit etc.

Now I need to change the word green everywhere inside this function according to the value of argument type. What is the easiest way to do it please? Thank you!

Wups · Accepted Answer · 2020-08-29 14:31:41Z

1

You could save the buttons and images in a dict:

self.buttons = { "green": self.green_button, ... }
self.images = {...}
...

Then, to retrieve the right objects:

self.canvas.itemconfigure(self.buttons[type], image=self.images[type])

answered Aug 29, 2020 at 14:31

Wups

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Comments

Abhimanyu Shekhawat · Accepted Answer · 2020-08-29 14:15:05Z

0

You can have use enum in python this way you can use meaningful names and map it to constant values.

answered Aug 29, 2020 at 14:15

Abhimanyu Shekhawat

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3 Comments

deadshot Over a year ago

add an example how enum helps the OP

Ondřej Baše Over a year ago

yes, please, can you add some example? I am reading the description and usage of enum, but I am still not sure how exactly can I use it in my case... thanks!

Abhimanyu Shekhawat Over a year ago

Sure, I am just constructing a simple example. I will post it shortly Can you maybe post your class structures and relevant code so that I can give an example relevant exactly to your case?

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