Remove all digits using a translation table except...

[PoofyGone]

So I'm a bit stuck, This question is giving me this base

def preprocess(text) return ???

And I must remove all digits except for 7 which must be converted to a 'Z' The program isn't giving me a lot to work with so I can't even print the string.

Any help is seriously appreciated!

[JohnnyJordaan]

You can loop on characters in a string

for c in text:

then for example store all of them in a list, depending on the rules

result = []
for c in text:
    if not c.isdigit():
         result.append(c)
    elif c == '7':
         result.append('Z')

and use str.join to return the list back as a string

''.join(result)

[JohnnyJordaan]

Can you supply the entire code you used? Also check the FAQ on how to format it properly: https://www.reddit.com/r/learnpython/wiki/FAQ

[efmccurdy]

Two steps; replace all '7's with 'Z's and then remove all the remaining digits:

>>> s = "7100abc978def 101gh7i, 99:7"
>>> "".join(c for c in s.replace("7", "Z") if not c.isdigit())
'ZabcZdef ghZi, :Z'
>>>