List Methods in Python?

Python provides some very useful list methods that we can use to perform list operation very easily.

Below are the list of python built-in methods which we can use on list:

append(x)

Adds an element at the end of the list

Example

#Append
lst = ['Hello', 'Python']
print(lst)
lst.append('Tutorialspoint')
print(lst)

Output

['Hello', 'Python']
['Hello', 'Python','Tutorialspoint']

clear()

Removes all the elements from the list

Example

#clear
lst = ['Hello','Python','Tutorialspoint']
print(lst)
lst.clear()
print(lst)

Output

['Hello', 'Python', 'Tutorialspoint']
[]

copy()

Returns a shallow copy of the list.

Example

#COPY()
#Without copy
lst = ['Hello', 'Python', 'Tutorialspoint']
lst1 = lst
lst1.append('Java')
print(lst)
print(lst1)
#With copy
lst = ['Hello', 'Python', 'Tutorialspoint']
lst1 = lst.copy()
lst1.append("Java")
print(lst)
print(lst1)

Output

['Hello', 'Python', 'Tutorialspoint', 'Java']
['Hello', 'Python', 'Tutorialspoint', 'Java']
['Hello', 'Python', 'Tutorialspoint']
['Hello', 'Python', 'Tutorialspoint', 'Java']

count()

Returns the number of elements with the specified value.

Example

lst = ['Hello', 'Python', 'Tutorialspoint', 'Python']
print(lst.count("Python"))
print(lst.count("Tutorialspoint"))
print(lst.count(" "))

Output

2
1
0

extend (iterables)

Add the elements of a list (or any iterable), to the end of the current list

Example

#extend(iterables)
lst = ['Hello', 'Python']
print(lst)
lst.extend(['Java', 'CSharp'])
print(lst)

Output

['Hello', 'Python']
['Hello', 'Python', 'Java', 'CSharp']

index(x[,start[, end]])

Returns the index of the first element with the specified value

Example

#index()
lst = ['Hello', 'Python', 'Tutorialspoint', 'Python']
print(lst.index('Python'))
print(lst.index("Python", 2))

Output

1
3

insert(i, x)

Adds an element at the specified position

Example

lst = ['Hello', 'Python', 'Tutorialspoint', 'Python']
print(lst)
lst.insert(0, "CPlusPlus")
print(lst)
lst.insert(3, "Java")
print(lst)

Output

['Hello', 'Python', 'Tutorialspoint', 'Python']
['CPlusPlus', 'Hello', 'Python', 'Tutorialspoint', 'Python']
['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']

pop([i])

Removes the element at the specified position

Example

#pop()
lst = ['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
print(lst)
#Without index
lst.pop()
print(lst)
#With Index
lst.pop(3)
print(lst)

Output

['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint']
['CPlusPlus', 'Hello', 'Python', 'Tutorialspoint']

remove(x)

Removes the first item with the specified value

Example

#Remove
lst = ['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
print(lst)
lst.remove('Python')
print(lst)

Output

['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
['CPlusPlus', 'Hello', 'Java', 'Tutorialspoint', 'Python']

reverse()

Reverses the order of the list

Example

#reverse()
lst = ['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
print(lst)
lst.reverse()

Output

['CPlusPlus', 'Hello', 'Python', 'Java', 'Tutorialspoint', 'Python']
['Python', 'Tutorialspoint', 'Java', 'Python', 'Hello', 'CPlusPlus']

sort(key = None, reverse = False)

Sorts the list

Example

#sort()
lst = [2, 3, 7, 1, 13, 8, 49]
print(lst)
#default
lst.sort()
print(lst)
#reverse = True
lst.sort(reverse = True)
print(lst)

Output

[2, 3, 7, 1, 13, 8, 49]
[1, 2, 3, 7, 8, 13, 49]
[49, 13, 8, 7, 3, 2, 1]

Arjun Thakur

Published on 02-May-2019 10:33:13

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