python new course, ” introduction of list-3 “, Python Basic Notes (Beginner), hindi

 Introducing Lists in Python | Python Tutorial for Beginners

In this lesson, we learn about Lists in Python.
A list is used to store multiple values in a single variable.

cars=[“maruti”,”bmw”,”nissan””toyata”]

              0               1             2             3

              -4              -3            -2           -1

Example of a List:

cars = ["maruti", "bmw", "nissan", "toyota"]

Index Position:

• maruti → 0

• bmw → 1

• nissan → 2

• toyota → 3

Negative Index:

• maruti → –4

• bmw → –3

• nissan → –2

• toyota → –1

Printing a List:

print(cars)

Accessing List Elements:

print(cars[0])
print(cars[-1])

Using .title() Method:

print(cars[0].title())

Example Sentence with List:

print("My first car was:", cars[0].title())

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Updating a List Item

Agar kisi purane item ko hata kar naya item add karna ho:

cars[2] = "safari"
print(cars)

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Using append()

append() method list ke end me naya item add karta hai:

cars.append("wagonr")
print(cars)

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Adding Items to an Empty List

friend = []

friend.append("sajid")
friend.append("intsar")
friend.append("deepak")
friend.append("murad")

print(friend)

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Using insert()

insert() se kisi bhi specific position par item add kar sakte hain:

friend = ["sajid", "intsar", "deepak", "murad"]
friend.insert(1, "bajaj")
print(friend)

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Using pop()

pop() list se item remove karta hai, aur removed value ko variable me store kiya ja sakta hai.

Last item remove karna:

cars = ["maruti", "bmw", "nissan", "toyota"]
x = cars.pop()
print(x)
print(cars)

Specific index se remove karna:

cars = ["maruti", "bmw", "nissan", "toyota"]
x = cars.pop(1)
print(x)
print(cars)

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Using remove()

remove() value ke naam se item ko delete karta hai:

cars = ["maruti", "bmw", "nissan", "toyota"]
x = "nissan"
cars.remove(x)
print(cars)

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Using del

del statement bhi list item delete karne ke liye use hota hai:

friend = ["sajid", "intsar", "deepak", "murad"]
del friend[3]
print(friend)

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Using sort()

sort() method list ko alphabetical order me arrange karta hai:

friend = ["sajid", "intsar", "deepak", "murad"]
friend.sort()
print(friend)

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Using sort(reverse=True)

Reverse alphabetical order ke liye:

friend = ["sajid", "intsar", "deepak", "murad"]
friend.sort(reverse=True)
print(friend)

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Using sorted()

sorted() temporary sorting karta hai, original list same rehti hai:

friend = ["sajid", "intsar", "deepak", "murad"]
x = sorted(friend)
print(x)

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Topics Covered in This Video:

• What is a List in Python

• Index and Negative Index

• Accessing List Elements

• Updating List Items

• append() Method

• insert() Method

• pop() Method

• remove() Method

• del Statement

• sort() Method

• sorted() Function

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