Python filter list usage example

This article mainly introduces the usage of the Python filter list and analyzes the definition, functions, and usage skills of the filter list in the form of instances, for more information about how to use Python filter lists, see the following example. We will share this with you for your reference. The details are as follows:

Filter list

[Mapping-expression for element in source-list if filter-expression]

A filter expression starts with if. a filter expression can be any expression that returns a true or false value (almost anything in Python. Any truth that is calculated as an element by a filter expression can be included in the ING. Other elements will be ignored, and they will not enter the ing expression, nor be included in the output list.

>>> Li = ["a", "mpilgrim", "foo", "B", "c", "B", "d ", "d"] >>> [elem for elem in li if len (elem)> 1] ['mpilgrim ', 'foo'] >>> [elem + elem for elem in li if len (elem)> 1] ['mpilgrimmilgrim', 'foofoo'] >>>

For more details about how to use the Python filter list, refer to the PHP Chinese website!