How to convert a string into a list

[Mark Phillips]

I have the following string - "['1', '2']" that I need to convert into a
list of integers - [1,2]. The string can contain from 1 to many integers. Eg
"['1', '7', '4',......,'n']" (values are not sequential)

What would be the best way to do this? I don't want to use eval, as the
string is coming from an untrusted source.

Thanks!

Mark
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