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Python Regular Expressions in Python Introduction to Regular Expressions Escapes

Posted by Anup Dudani
Anup Dudani
700 Points

Regular Expressions in python

Now, write a function named numbers() that takes two arguments: a count as an integer and a string. Return an re.search for exactly count numbers in the string. Remember, you can multiply strings and integers to create your pattern.

For example: r"\w" * 5 would create r"\w\w\w\w\w".

escapes.py 
import re
def first_number(myString):
  return re.search(r'\d',myString)

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

Why am i getting it wrong?

1 Answer

Martin Cornejo Saavedra
Martin Cornejo Saavedra
18,132 Points
Martin Cornejo Saavedra
Martin Cornejo Saavedra
18,132 Points

Because it asks to search for numbers (\d), not characters (\w):

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

def numbers(count, myString):
  return re.search(r'\d'*count, myString)   #change \w for \d
Cristian Romero
Cristian Romero
11,911 Points
Cristian Romero
Cristian Romero
11,911 Points

The wording of the 2nd part of the question was a bit confusing but I got it!