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Python Regular Expressions in Python Introduction to Regular Expressions Escapes

Dhruv Ghulati
Dhruv Ghulati
1,582 Points
Posted by Dhruv Ghulati
Dhruv Ghulati
1,582 Points

'NoneType' object has no attribute 'group'

Any idea why this is doing this?

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

2 Answers

Robert Richey
PLUS
Robert Richey
Courses Plus Student 16,352 Points
Robert Richey
Robert Richey
Courses Plus Student 16,352 Points

Hi Dhruv,

The challenge is expecting a search, instead of a match.

The function should search, with a regular expression, the first number in the string and return the match object.

Kind Regards

Dhruv Ghulati
Dhruv Ghulati
1,582 Points
Dhruv Ghulati
Dhruv Ghulati
1,582 Points

I even tried

def first_number(i):
  return re.search(r'/d',i)

And get the same error, which makes me think that it is something to do with the object i. If I put i=str() before my return, I get the same error though...

Robert Richey
Robert Richey
Courses Plus Student 16,352 Points

In your first post, the d was being escaped correctly, with a backslash - now you're using a forward slash, so the program is now looking for the literal string '/d' instead of a number.