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Python Regular Expressions in Python Introduction to Regular Expressions Escapes

Ryan McGuire
Ryan McGuire
3,757 Points

Did I use the wrong arguments or is there something wrong with my return line 8

Did I use the wrong arguments or is there something wrong with my return line 8

import re

def first_number(numbers):
    return re.search(r'\d',numbers)

def numbers(count,string):
    return re.search(r'"\w"*count',string)

2 Answers

Steven Parker
Steven Parker
221,310 Points

You need to remove the extra set of quotes that enclose the word "count" for it to be recognized as a variable name. Also, since the function should be looking for numbers, you'll want to use "\d" instead of "\w" for the character class.

You could also create a recurrence constraint by adding a value and perhaps a comma between curly braces ({}). And for that method you may want to build up the regex string using formatting or concatenation.

You don't need the extra ' ' around "\w"*count and the \w is still a \d like from the first challenge.

a passing example below:

import re

def first_number(string_argument): return re.search(r"\d", string_argument)

def numbers(count_int, count_str): return re.search(r"\d" * count_int, count_str)