I have a phone number(string), e.g. "+123-456-7890", that I want to turn into a list that looks like: [+, 1, 2, 3, -, ...., 0].

Why? So I can go iterate through the list and remove all the symbols, so I'm left with a list of only digits, which I can then convert back to a string.

What's the best way to solve this problem? None of the solutions I've come across are applicable, because I don't have any special characters in-between the digits (so I can't split the string there.)

Any ideas? I really appreciate it!

Edit - this is what I've tried:

x = row.translate(None, string.digits)
list = x.split()

Also: 

filter(lambda x: x isdigit())
python string list
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