CODEWITHSUNDEEP
pythonregexpython-3.xmatch
Ludisposed
Ludisposed

Reputation: 1769

Python regex to match punctuation at end of string

I need to match if a sentence starts with a capital and ends with [?.!] in Python.

EDIT It must have [?.!] only at end but allow other punctuation in the sentence

import re
s = ['This sentence is correct.','This sentence is not correct', 'Something is !wrong! here.','"This is an example of *correct* sentence."']

# What I tried so for is:
for i in s:
    print(re.match('^[A-Z][?.!]$', i) is not None)

It does not work, after some changes I know the ^[A-Z] part is correct but matching the punctuation at the end is incorrect.

Upvotes: 9

Views: 35754

Answers (3)

Ludisposed
Ludisposed

Reputation: 1769

I made it working for myself, and just for clarification or if other people have the same problem this is what did the trick for me:

re.match('^[A-Z][^?!.]*[?.!]$', sentence) is not None

Explanation: Where ^[A-Z] looks for a Capital at start

'[^?!.]*' means everything in between start and end is ok except things containing ? or ! or .

[?.!]$ must end with ? or ! or .

Upvotes: 19

Chankey Pathak
Chankey Pathak

Reputation: 21666

Use the below regex.

^[A-Z][\w\s]+[?.!]$

Regex demo: https://regex101.com/r/jpqTQ0/2

import re
s = ['This sentence is correct.','this sentence does not start with capital','This sentence is not correct']

# What I tried so for is:
for i in s:
    print(re.match('^[A-Z][\w\s]+[?.!]$', i) is not None)

Output:

True
False
False

Working code demo

Upvotes: 2

Maroun
Maroun

Reputation: 95958

Your regex checks for a single digit in the range [A-Z]. You should change to something like:

^[A-Z].*[?.!]$

Change the .* to whatever you want to match between the capital letter and the punctuation at the end of the string.

Upvotes: 1

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