Python Tips (iii)--list three ways to delete an element

Source: Internet
Author: User

Let's take a list of elements of a string as an example, and delete the elements:

>>> l = [‘no surfing‘, ‘flippers‘]
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Law One: Remove (val)
>>> l.remove(‘no surfing‘)>>> l[‘flippers‘]
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    • (1) The parameter of remove () is a specific element value, not an index,
    • (2) If you know the index, how to use Remove to delete the element value on the index,

      l.remove(l[1])
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      This is a great risk because list allows duplicates, remove () delete the first element in the list and the value of the parameter equal

Law II: Pop (0)
    • (1) the pop () receives the index, and the last element (typical stack ) is deleted without reference.

    • (2) Pop () has a return value, which returns the value of the deleted element

      l.pop() <==> l.pop(-1)
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    • (3) List of append () (added to the tail), pop () (ejected from the tail), successfully changed the list to a stack

Law III: Del (l[0])
>>> del(l[0])

Python Tips (iii)--list three ways to delete an element

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