How python calculates the number of occurrences of list items

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1. To calculate the number of occurrences of list items, you can use count ().

> l = ["a", "b", "b"] > l.count ("a") 1 > l.count ("b") 2

Calculating the number of occurrences of all items in a list is also known as a count list or creating a count counter.

2. Use count () to calculate all items. To calculate the number of occurrences of a project, you can simply use the list understanding and count () method.

[[xmeme l.count (x)] for x in set (l)]

Calculate the number of occurrences of an item in the list

3. Any iterable object can be dumped into Counter.

Not just lists, and Counter retains the data structure of element counting.

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