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Documentation Index

Fetch the complete documentation index at: https://rajanand.org/llms.txt

Use this file to discover all available pages before exploring further.

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Create a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(list1)
print(type(list1))

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
<class 'list'>

​
Create an empty list

list1 = []
print(list1)
print(type(list1))

Output:
[]
<class 'list'>

​
Access an element in a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(list1[0])

Output:
1

​
Access an element in a list using negative index

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(list1[-1])

Output:
10

​
Access a range of elements in a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(list1[0:5])

Output:
[1, 2, 3, 4, 5]

​
Add an element to a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.append(11)
print(list1)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

​
Add an element to a list at a specific index

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.insert(0, 0)
print(list1)

Output:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

​
Remove an element from a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.remove(10)
print(list1)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9]

​
Remove an element from a list

  • at a specific index
list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.pop(0)
print(list1)

Output:
[2, 3, 4, 5, 6, 7, 8, 9, 10]
  • using del
list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
del list1[0]
print(list1)

Output:
[2, 3, 4, 5, 6, 7, 8, 9, 10]

​
Remove all elements from a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.clear()
print(list1)

Output:
[]

​
Check if an element is in a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(11 in list1)
print(1 in list1)

Output:
False
True

​
Get the length of a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(len(list1))

Output:
10

​
Sort a list

list1 = [6, 7, 8, 9, 10, 1, 2, 3, 4, 5]
list1.sort()
print(list1)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

​
Sort a list in reverse order

list1 = [6, 7, 8, 9, 10, 1, 2, 3, 4, 5]
list1.sort(reverse=True)
print(list1)

Output:
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

​
Reverse a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list1.reverse()
print(list1)

Output:
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

​
Copy a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list2 = list1.copy()
print(list2)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

​
Join two lists

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list2 = [11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
list3 = list1 + list2
print(list3)
print(type(list3))

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
<class 'list'>
  • using extend
list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
list2 = [11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
list1.extend(list2)
print(list1)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]

​
Remove duplicates from a list

Set is a collection of unique elements. set is used to remove duplicates from a list. 
list1 = [1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10]
list1 = list(set(list1))
print(list1)

Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

​
Find the index of an element in a list

list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(list1.index(5))

Output:
4