List and Tuple in Python | Shrddha Khapra #Lec 03

 # Lists in python
# a built in data types that can stores set of values
# it can store different type of element(integer,string,float,ect)

marks = [12.3,23.6,45.7,89.9,77.6]

print(marks)

# we can get value at index like string we have already read it

idx = marks[0]

print(idx)

# we can check our list type

print(type(marks))   #list class also be "lists"

# we can print list legenth

print(len(marks))

# it can store different type of element(integer,string,float,ect)

student = ["asad",345,"ali",34.0]

print(student)

std_idx = student[0]

print(std_idx)

# lists are muteable in python we can change in lists and not possible in string

new_std = ["ali",56,89.0]

new_std[0] = "asad"

print(new_std)  #here we can made change in list

# List Slicing

# similar to string Slicing

# syntax : list_name[starting_idx : ending_idx]  * ending idx is not included

serial = [67,89,809,990,89,90,9]

slicing = serial[0 : 4]  #slicing all elements

# print(slicing)

print(serial[ :6]) # in this line i have pass last index it will me all indices

print(serial[0 : ])   # here i have passed starting index it will give me all indicies bcz we have not enter ending index it willconsider all idicis same upper print statment

# we can also use negative idexing here

print(slicing[-4:-1])

# Lits methoeds/functions

lists = [1,5,3,4]

lists.append(9)   #add one element at the  enf

lists.sort() #sort in assending order

"""lists.sort(reverse = True)""" #sort in desending order

# we can reverse our list (hum apni list ulta saktey starting value end mein aur ending value start mein aa jaye gi)

lists.reverse()

# insert element at any index

lists.insert(1,"asad")

print(lists)

# we can apply assending and dessending metoeds on string

str1 = ["banana","mango","apple","grips"]

"""str1.sort()"""     #assending

str1.sort(reverse = True)  #desending

print(str1)

listn = [2,1,3,1]

"""listn.remove(1)"""          #remove first occurance

listn.pop(2)                   #remove at index

print(listn)

# we can search python documentation on google

# Tuples in python

# A built in data type let us immutable sequence of values we can't make a change in"tup"

""""

tup = (78,90,76,43,45)    #tup[0],tup[1]

tup[0] = 58 # we cannot change because it immutable

print(tup)    #it will give you error!

"""

#  tup[0] = 58 # we cannot change because it immutable

tup = (12,45,67,89)

print(type(tup))   #its type istuple

# difference b/w list and tuple is list is mutable and tuple is immutable

tup1 = (23,56,78,90)

print(tup1[0:3])

# Tuple methoeds

# return  first occurs index

tuple2 = (1,2,3,1,2)

return_idx = tuple2.index(2)  #return index of first occurance

print(return_idx)

# count total appearance

tuple3 = (6,7,9,4,6,7,4)

count_occur = tuple3.count(6) #count total occurances

print(count_occur)

#Let's practice

# wap to ask user to enter thier 3 favorite movies name and store them in list

"""

user = str(input("enter your 1st favorite movie name = "))

user2 = str(input("enter your 2nd favorite movie name = "))

user3 = str(input("enter your 3rd favorite movie name = "))

# movies_list = [user,user2,user3]

# movies_list.sort()

# print(movies_list)

movies = []

movies.append(user)

movies.append(user2)

movies.append(user3)

# print(movies)

"

"""

# WAP to check  if list contain a palindrome of elements (hint:use copy() metoed)

listn = [1,2,3,2,1]

palind = listn.copy()

palind.reverse()

if(listn == palind):

    print("this is palindrome list")

else:

    print("this is not palindrome list")

# WAP to count the number of student with A grade in following tuple

"""

grade = ("C","D","A","A","B","B","A")

grade_counter = grade.count("A")

print(grade_counter)

"""

grade = ["C","D","A","A","B","B","A"]

grade.sort()

print(grade)