How do I verify that a string only contains letters, numbers, underscores and dashes?

Question

I know how to do this if I iterate through all of the characters in the string but I am looking for a more elegant method.

Answer 1

You could always use a list comprehension and check the results with all, it would be a little less resource intensive than using a regex: all([c in string.letters + string.digits + ["_", "-"] for c in mystring])