Programming in Python/

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Basic List Operations

Basic List Operations

Learn about basic list operations in Python.

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Some basic list operations are given below.

Mutability

Unlike strings, lists are mutable (changeable). Lists can be updated, as shown below:

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Python 3.8
animals = ['Zebra', 'Tiger', 'Lion', 'Jackal', 'Kangaroo']
ages = [25, 26, 25, 27, 26, 28, 25]
animals[2] ='Rhinoceros'
print(animals)
ages[5] = 31
print(ages)
ages[2:5] = [24, 25, 32] # sets items 2 to 4 with values 24, 25, 32
print(ages)
ages[2:5] = [ ] # delete items 2 to 4
print(ages)

Concatenation

One list can be concatenated (appended) at the end of another, as shown below:

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Python 3.8
lst = [12, 15, 13, 23, 22, 16, 17]
lst = lst + [33, 44, 55]
print(lst) # prints [12, 15, 13, 23, 22, 16, 17, 33, 44, 55]

Merging

Two lists can be merged to create a new list, as shown below:

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Python 3.8
s = [10, 20, 30]
t = [100, 200, 300]
z = s + t
print(z) # prints [10, 20, 30, 100, 200, 300]

Conversion

A string, tuple, or set can be converted into a list using the ...