python indexof list

The first argument is the index of the element before which to insert, so a.insert(0, x) inserts at the front of the list, and a.insert(len(a) ... (see Sequence Types — list, tuple, range). Since Python is an evolving language, other sequence data types m

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    An Introduction to Python Lists - effbot.org
    http://www.effbot.org
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    https://www.tutorialspoint.com