What are some useful Python functions I should know?

What are some useful Python functions I should know?

Some useful Python functions include len(), range(), sum(), and map(). Would you like to know more about any specific function?

Can you explain how the map() function works?

Sure! The map() function applies a given function to all items in an iterable (like a list) and returns a map object. You can convert it to a list using list(). For example, list(map(lambda x: x**2, [1, 2, 3])) will return [1, 4, 9].

What about the filter() function?

The filter() function creates a list of elements for which a function returns true. For example, list(filter(lambda x: x > 0, [-1, 0, 1, 2])) will return [1, 2].

Are there any built-in functions for string manipulation?

Yes! Python has several built-in string functions like str.upper(), str.lower(), and str.split(). Would you like examples of how to use them?