I have these inputs:

s1 = 'I am using c   programming'. 

s2 = = 'I am usingc   programming'. 

I want to check if s1 or s2 contains the exact word c .

running this regex on both s1 and s2, it does not give any output:

x=s1 #x=s2

if re.search(r'\bc\ \ \b', x):
    print(x)

expected result: detect c in s1

CodePudding user response：

You may use this regex for this using different flavors of word boundaries:

\bc\ \ \B

RegEx Demo

RegEx Details:

• \b: Word boundary between a non-word and word character
• c\ \ : Match c
• \B: Inverse of word boundary to match where \b doesn't match

Python Code:

>>> import re
>>> s1 = 'I am using c   programming'
>>> s2 = 'I am usingc   programming'
>>> rx = re.compile(r'\bc\ \ \B')
>>> print (rx.findall(s1))
['c  ']
>>> print (rx.findall(s2))
[]
>>>

CodePudding user response：

You could do the following

import re
x = 'I am using c   programming'

pattern = re.compile(" c\ \  ")
results = re.findall(pattern, x)

if results:
    print(x)

If c is not in the string, results will be empty.