I want that you can give a string (Userinput) and then I want to delete all characters that aren't letters (so a-z and A-Z are the only ones which stay in the string).
Can anyone help me?
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What have you tried? This is very easy to do, you surely can give it a try! – ForceBru Mar 15 '19 at 17:23
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as highlighted by @ForceBru, you can also use regex. – Hayat Mar 15 '19 at 17:25
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Possible [Duplicate](https://stackoverflow.com/questions/3939361/remove-specific-characters-from-a-string-in-python) – Kaiwen Chen Mar 15 '19 at 17:25
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Look into the regular expression module (import re). re.sub("[^A-za-z]","",YourString) or something like that should do the trick. – Alain T. Mar 15 '19 at 17:27
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@Kaiwen Chen. Isn't there a way to delete all non-letters, in the other question, you have to write the characters you want to delete. – BOB Mar 15 '19 at 17:27
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Learn how to use regex. Here is the [documentation](https://docs.python.org/3/library/re.html) hint: [A-Za-z] – Kaiwen Chen Mar 15 '19 at 17:32
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Is your input a list or a string? – xskxzr Mar 15 '19 at 19:20
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@xskxzr. A string – BOB Mar 16 '19 at 12:37
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You need to use Python's re (regular expression) module. More specifically you could try using the re.sub method. Here is a quote from the official documentation:
re.sub(pattern, repl, string, count=0, flags=0)Return the string obtained by replacing the leftmost non-overlapping occurrences ofpatterninstringby the replacementrepl.
For example, if your string is 'God damn 47', you could do re.sub('[0-9]', '', 'God damn 47') and get 'God damn '. This will substitute any digit within the string with '' (empty string) which is equivalent to deleting them. Remember to import the re module with the statement import re.
Mike
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