Tutorial #12: Super QUICK way to filter a list with Python filter() function _ Python for Beginners
Without using for or while loop, you can filter a Python list very quickly with filter() function. I love this method because it's convenient, just one line of code, and easy to apply. Of course you can use this function for multiple conditions with lambda expression.
Functions used in the video:
filter(function, iterable):
Construct an iterator from those elements of iterable for which function returns true. iterable may be either a sequence, a container which supports iteration, or an iterator. If function is None, the identity function is assumed, that is, all elements of iterable that are false are removed.
Note that filter(function, iterable) is equivalent to the generator expression (item for item in iterable if function(item)) if function is not None and (item for item in iterable if item) if function is None.
Lambda expressions:
Lambda expressions (sometimes called lambda forms) are used to create anonymous functions. The expression lambda parameters: expression yields a function object. The unnamed object behaves like a function object defined with:
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