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Python Regular Expressions in Python Introduction to Regular Expressions Escapes

Ryan McGuire
Ryan McGuire
3,758 Points
Posted by Ryan McGuire
Ryan McGuire
3,758 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

escapes.py 
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
231,198 Points
Steven Parker
Steven Parker
231,198 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.

kgoldthorpe
kgoldthorpe
7,802 Points
kgoldthorpe
kgoldthorpe
7,802 Points

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)