Built-In String Methods: Overview – Real Python

Manipulating Strings With String Methods – Real Python

Advanced String Methods in Python Part 1 (Video 38)

Python: Find an Index (or all) of a Substring in a String • datagy

Python TypeError: string index out of range Solution

5 Ways to Find the Index of a Substring in Python | Built In

Guide to String Formatting in Python Using F-strings | Built In

Python F-string Formatting

Guide To String Formatting In Python | Simplilearn