Methods of python list
Author: Al-mamun Sarkar
Date: 2020-03-24 20:16:51
Python list functions. Append item, Insert item, extend a list, add two lists, print list, delete an item from a list, pop item from the list. Pythons
List of Python list's methods:
| Method | Description |
|---|---|
| append() | Used to add a new item at the end of the list |
| clear() | Delete all the items from the list |
| copy() | Create a new copy of the list |
| count() | Returns the number of items with the given value |
| extend() | Add two list |
| index() | Used to get the index of the first item with the given value |
| insert() | Used to add an item at the specified position |
| pop() | Removes the element at the specified position |
| remove() | Used to delete the item with the given value |
| reverse() | Used to reverses the order of the list |
| sort() | Used to sort the list in ascending and descending order |
Code:
l = ['one', 'two', 'three', 'four']
print (l[1])
print (l[1:3])
print (l[:4])
print (l[2:])
print(type(l))
l[1] = 2
print (l[1])
l.append('five')
print (l)
l.insert(2, 'new')
print(l)
l.extend(['six', 'seven'])
print(l)
l = l + ['eight', 'nine']
print (l)
del l[2]
print(l)
l.remove('five')
print(l)
del l[-1]
print(l)
l.pop()
print(l)
Output:
two
['two', 'three']
['one', 'two', 'three', 'four']
['three', 'four']
2
['one', 2, 'three', 'four', 'five']
['one', 2, 'new', 'three', 'four', 'five']
['one', 2, 'new', 'three', 'four', 'five', 'six', 'seven']
['one', 2, 'new', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
['one', 2, 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
['one', 2, 'three', 'four', 'six', 'seven', 'eight', 'nine']
['one', 2, 'three', 'four', 'six', 'seven', 'eight']
['one', 2, 'three', 'four', 'six', 'seven']
Count, Len, reverse, sort function of the list:
l = ['one', 'two', 'three', 'four', 'two', 'a']
print(len(l))
print(l.count('two'))
l.reverse()
print(l)
l.sort()
print(l)
Output:
6
2
['a', 'two', 'four', 'three', 'two', 'one']
['a', 'four', 'one', 'three', 'two', 'two']