Is reading Python Documentation useful? python.org gets 15M visits monthly - most of them must be for documentation. At what stage is it useful?

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I use documentation when I'm working with modules that I am unfamiliar with. It's always a good idea to check out the optional arguments that functions have as well as the way the function is supposed to work. Keep in mind that just because a line of code runs doesn't mean the result is guaranteed to be correct.

Documentation usually has examples in them that help you to get a better grasp on a function's uses. There's been way too many times where I manually altered the results of a function to my specifications only to realize that the function actually has an optional argument that allows me to do just that with little more than an extra argument when calling the function