delete items from list of list: pythonic way

In Python, use list methods clear(), pop(), and remove() to remove items (elements) from a list. It is also possible to delete items using del statement by specifying a position or range with an index or slice.,clear(), pop(), and remove() are methods of list. You can also remove elements from a list with del statements.,To remove multiple items that satisfy the condition at once, use the list comprehensions described below.,Remove items that meet the condition: List comprehensions

l = [0, 1, 2]

l.clear()
print(l)
#[]

l = [0, 10, 20, 30, 40, 50]

print(l.pop(0))
# 0

print(l)
#[10, 20, 30, 40, 50]

print(l.pop(3))
# 40

print(l)
#[10, 20, 30, 50]

print(l.pop(-2))
# 30

print(l)
#[10, 20, 50]

print(l.pop())
# 50

print(l)
#[10, 20]

# print(l.pop(100))
# IndexError: pop index out of range

l = ['Alice', 'Bob', 'Charlie', 'Bob', 'Dave']

l.remove('Alice')
print(l)
#['Bob', 'Charlie', 'Bob', 'Dave']

Suggestion : 2

By the end, you'll know how to use remove() to remove an item from a list in Python.,And there you have it! You now know how to remove a list item in Python using the remove() method. You also saw some ways of removing all occurrences of an item in a list in Python.,The remove() method is one of the ways you can remove elements from a list in Python.,remove() removes only the first occurrence of an item How to remove all occurrences of an item

The general syntax of the remove() method looks like this:

list_name.remove(value)

remove() will search the list to find it and remove it.

#original list
programming_languages = ["JavaScript", "Python", "Java", "C++"]

#print original list
print(programming_languages)

# remove the value 'JavaScript'
from the list
programming_languages.remove("JavaScript")

#print updated list
print(programming_languages)

#output

#['JavaScript', 'Python', 'Java', 'C++']
#['Python', 'Java', 'C++']

If you specify a value that is not contained in the list, then you'll get an error – specifically the error will be a ValueError:

programming_languages = ["JavaScript", "Python", "Java", "C++"]

#I want to remove the value 'React'
programming_languages.remove("React")

#print list
print(programming_languages)

#output

# line 5, in <module>
   #programming_languages.remove("React")
   #ValueError: list.remove(x): x not in list

Another way to avoid this error is to create a condition that essentially says, "If this value is part of the list then delete it. If it doesn't exist, then show a message that says it is not contained in the list".

programming_languages = ["JavaScript", "Python", "Java", "C++"]

if "React" in programming_languages:
   programming_languages.remove("React")
else:
   print("This value does not exist")

#output
#This value does not exist

Let's look at the following example:

programming_languages = ["JavaScript", "Python", "Java", "Python", "C++", "Python"]

programming_languages.remove("Python")

print(programming_languages)

#output
#['JavaScript', 'Java', 'Python', 'C++', 'Python']

Suggestion : 3

EXAMPLE:

myList = ["Bran", 11, 3.14, 33, "Stark", 22, 33, 11]

print(myList)

myList = ["Bran", 11, 22, 33, "Stark", 22, 33, 11]

myList.remove(22)

myList

EXAMPLE 2:

myList.remove(44)

EXAMPLE 2:

myList

EXAMPLE 3:

myList.pop(8)

Suggestion : 4

Remote Work 2022 , Remote Work 2022

list.remove(value)

Code to remove item from list by value:

list1 = ["Hire", "Hire", "the", "top", 10, "python", "freelancers"]

list1.remove("Hire")
print(list1)

#Output - ['Hire', 'the', 'top', 10, 'python', 'freelancers']

Syntax of pop()

list.pop(index)

Syntax of del:

del object_name

Code to remove items using del

list1 = ["Hire", "the", "top", 10, "python", "freelancers"]

del list1[0]
print(list1)

#Output - "['the', 'top', 10, 'python', 'freelancers']"

Suggestion : 5

The remove() method takes a single element as an argument and removes it from the list.,The remove() method removes the first matching element (which is passed as an argument) from the list.,If a list contains duplicate elements, the remove() method only removes the first matching element.,Also, you can use the Python del statement to remove items from the list.

Example

# create a list
prime_numbers = [2, 3, 5, 7, 9, 11]

# remove 9 from the list
prime_numbers.remove(9)

# Updated prime_numbers List
print('Updated List: ', prime_numbers)

# Output: Updated List: [2, 3, 5, 7, 11]

Example

# create a list
prime_numbers = [2, 3, 5, 7, 9, 11]

# remove 9 from the list
prime_numbers.remove(9)

# Updated prime_numbers List
print('Updated List: ', prime_numbers)

# Output: Updated List: [2, 3, 5, 7, 11]

The syntax of the remove() method is:

list.remove(element)

Example 1: Remove element from the list

# animals list
animals = ['cat', 'dog', 'rabbit', 'guinea pig']

# 'rabbit'
is removed
animals.remove('rabbit')

# Updated animals List
print('Updated animals list: ', animals)

If a list contains duplicate elements, the remove() method only removes the first matching element.

# animals list
animals = ['cat', 'dog', 'dog', 'guinea pig', 'dog']

# 'dog'
is removed
animals.remove('dog')

# Updated animals list
print('Updated animals list: ', animals)

Example 3: Deleting element that doesn't exist

# animals list
animals = ['cat', 'dog', 'rabbit', 'guinea pig']

# Deleting 'fish'
element
animals.remove('fish')

# Updated animals List
print('Updated animals list: ', animals)