- Arrays is a collections of one or more items at the same time.
- We can access the elements using index values of array.
append()
- It is used to add or append the element to existing array at the end of array list.
Syntax
list.append(element) Example
a = [1, 2, 3] b = [7, 8, 9] b.append(2) print(b) # output: [7, 8, 9, [1, 2, 3]] clear()
- It is used to clear or remove all the elements in the array list.
Syntax
list.clear() Example
a = ["Hi", "Welcome", "Bye"] a.clear() print(a) # output: [] copy()
- It is used to copy the specific list of data.
Syntax of copy
list.copy() Example
a = ["ball", "bat", "cat", "dog"] x = a.copy() print(x) # output: ['ball', 'bat', 'cat', 'dog'] count()
- It gives the number of elements for specified value in the list.
Syntax
list.count(value) Example
n = [1,2,3,4,1,3,6,4,8] m = n.count(3) print(m) # output: 2 extend()
- It adds the specific list of elements at the end of the current array list.
Syntax
list.extend(iterable) # iterable - it can be a list, set, tuple etc. Example
n = ['This is a list'] m = ['List of elements.'] m.extend(n) print(m) # output: ['This is a list', 'List of elements.'] index()
- It returns the index value of a specific element.
- if we have duplicates in the list, the index will the take the first occurs of the element in the list.
Syntax
list.index(elemnt) #elemnt - it can be string, number, list etc. Example
n = [1,2,3,4,1,3,6,4,8] x = n.index(4) print(x) # output: 3 insert()
- It used to insert the element at specific index value in the array. #### Syntax
list.insert(pos, elemnt) # pos - at which position of index we want to insert. # elemnt - it can be string, number, object etc. Example
a = ['ball', 'bat', 'cat', 'dog'] a.insert(1, 'lion'] print(a) # output: ['ball', 'lion', 'bat', 'cat', 'dog'] pop()
*It removes the element at a specific value.
Syntax
list.pop(pos) #pos - at which position of index we want. Example
a = ['ball', 'bat', 'cat', 'dog'] a.pop(1) print(a) # output: ['ball', 'cat', 'dog'] remove()
- It removes the first occurrence of the element with specified value. #### Syntax
list.remove(elemnt) #elemnt - it can be string, number, list etc. Example
n = [1,2,3,4,1,3,6,4,8] n.remove(1) print(n) # output: [2, 3, 4, 1, 3, 6, 4, 8] reverse()
- It create a new string containing the original data in reverse order.
Syntax
list.reverse() Example
a = ['ball', 'bat', 'cat', 'dog'] a.reverse() print(a) # output: ['dog', 'cat', 'bat', 'ball'] sort()
- It will sort the list in ascending order by default.
Syntax
list.sort(reverse = true|false, key=myfun) #reverse - reverse=True will sort the list descending. Default is reverse=False #key - function to specify the sorting criteria. Example
n = [1,2,3,4,1,3,6,4,8] n.sort() print(n) # output: [1, 1, 2, 3, 3, 4, 4, 6, 8] 
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