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pythoncredit-card

How can I extract credit card substring from a string using python

I am new to python and I hope someone can help me with this. I need to extract credit card numbers from a string. e.g

"My credit card number is 1234-2312-2312-2312" or "My Credict card number is 1234 1234 1832 1234"

Anyone knows how I can do it?

Solution

  • Do it like this using regex

    import re

def findCardNumber(string):
    pattern = r"(^|\s+)(\d{4}[ -]\d{4}[ -]\d{4}[ -]\d{4})(?:\s+|$)"

    match = re.search(pattern, string)

    if match:
        print(match.group(0))

findCardNumber("My Credict card number is 1234 1234 1832 1234")

    This also considers the location of your card number in the string, it can be anywhere - at the beginning, somewhere in the middle or at the end.