How can I check if a string contains a specific substring in Python?

How can I check if a string contains a specific substring in Python?

You can use the in keyword to check if a substring exists in a string. For example: if 'substring' in my_string:.

What if I want to check for case-insensitive matches?

You can convert both the string and the substring to the same case using .lower() or .upper(). For example: if 'substring'.lower() in my_string.lower():.

Are there any other methods to do this?

Yes, you can also use the str.find() method, which returns the index of the substring or -1 if not found.

Can you show me an example using str.find()?

Sure! Here's an example: index = my_string.find('substring'); if index != -1: print('Found at index', index).