Question

Is there any other method in Python that can change a string to a variable?
For example, I have some variables named button1, button2, button3, etc. I want to operate on them in a loop. If I don’t want to use eval, anything else suitable?

Answer 1

There’s globals and locals which return a dictionary mapping of your current namespace.

e.g.:

a = 1
print globals()['a']  #1

globals should be used if the variable is defined at the module level, locals should be used for everything else. In your case, I would think that locals()['button1'] would do the trick.

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Having said that, it’s probably a better idea to just put the buttons in a dictionary in the first place.