How to use a variable inside a regular expression?

Question

I\'d like to use a variable inside a regex, how can I do this in Python?

TEXTO = sys.argv[1]

if re.search(r\"\\b(?=\\         


        

Answer 1

You can use format keyword as well for this.Format method will replace {} placeholder to the variable which you passed to the format method as an argument.

if re.search(r"\b(?=\w)**{}**\b(?!\w)".**format(TEXTO)**, subject, re.IGNORECASE):
    # Successful match**strong text**
else:
    # Match attempt failed