Pitfalls in using built-in string functions in Python

When using built-in functions of strings in Python, there are a few common mistakes that people make. Here are some examples with code samples:

1. Not using parentheses to call the function:

When calling a built-in function of a string, it's important to use parentheses to indicate a function call. Forgetting to include parentheses can lead to unexpected results or errors.

2. Forgetting to assign the result of the function to a variable:

Built-in string functions in Python return a modified version of the original string. Forgetting to assign the result of the function call to a variable will discard the modified string and lead to undesired outcomes.

3. Not accounting for immutability of strings:

Strings in Python are immutable, which means their values cannot be changed after they are created. Some string functions return a modified copy of the original string rather than modifying the string in-place. Not understanding this can lead to confusion or incorrect assumptions.