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

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