Python String Contains Substring Method

• Python Substring Using in Operator
• Check Substring Using in operator
• Check Substring Using find() Function

Python Substring Using in Operator

Python has a comparison operator “in” that you should use when need to find availability of a substring inside a string. The keyword “in” is used as a comparison operator.

Check Substring Using in operator

if "world" in "webmastercampus": 
    continue

The opposite (complement), which the original question asks for, is not in:

if "world" not in "webmastercampus": 
    continue

Check Substring Using find() Function

message = "This be a sub-string"
if message.find("is") == -1:
    print("'is' not available in message")
else:
    print("'is' available in message")