CODEWITHSUNDEEP
pythonregex
user12949716
user12949716

Reputation:

write regrex expression to find if there are special characters at the start and end of a string, (disregard whitespaces)

I am trying to write a regrex expression that checks if certain characters & and @ appear at the start and end of the string.

This is what I have so far:

import re
def check_operators(inputstr):
    return bool(re.search(r'^[&@]|[&@]^', inputstr))

print(check_operators("25 &")) #code outputs False
print(check_operators("& 25")) #code outputs True
print(check_operators(" & 25")) #code outputs False

All three of the outputs should be "True" because it should find those characters at the start and end of the string, but my code doesn't seem to be working. Any ideas?

Upvotes: 1

Views: 63

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626950

You may use

def check_operators(string1):
    return bool(re.search(r'^\s*[&@]|[&@]\s*$', string1))

See the Python demo

Details

  • ^\s*[&@] - start of string, 0+ whitespaces, & or @
  • | - or
  • [&@]\s*$ - & or @, 0+ whitespaces, end of string.

Upvotes: 1

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