All methods of Python list types

The list type has many methods, here are all the methods of the list type:

list.append(x)

Appends an element to the end of the list, equivalent to a[len(a):] = [x] .

list.extend(L)

Adds all elements in a given list to another list, equivalent to a[len(a):] = L .

list.insert(i, x)

Insert an element at the specified position. The first parameter is the index of the element to be inserted before it. For example, a.insert(0, x) will be inserted before the entire list, and a.insert(len(a), x) is equivalent to a.append( x).

list.remove(x)

Remove the first element with value x in the list. If there is no such element, an error will be returned.

list.pop([i])

Removes an element from the specified position in the list and returns it. If no index is specified, a.pop() returns the last element. The element is removed from the list. (The square brackets around i in the method indicate that this parameter is optional, rather than requiring you to enter a pair of square brackets. You will often encounter such marks in the Python library reference manual.)

list.index(x)

Returns the index of the first element in the list with value x. If there are no matching elements, an error will be returned.

list.count(x)

Returns the number of times x appears in the list.

list.sort()

Sorts the elements in the list in place.

list.reverse()

Reverse the elements in the list in place.

The example below demonstrates most of the list methods

>>> a = [66.25, 333, 333, 1, 1234.5]
>>> print a.count(333), a.count(66.25), a.count('x')
2 1 0
>>> a.insert(2, -1)
>>> a.append(333)
>>> a
[66.25, 333, -1, 333, 1, 1234.5, 333]
>>> a.index(333)
1
>>> a.remove(333)
>>> a
[66.25, -1, 333, 1, 1234.5, 333]
>>> a.reverse()
>>> a
[333, 1234.5, 1, 333, -1, 66.25]
>>> a.sort()
>>> a
[-1, 1, 66.25, 333, 333, 1234.5]