Taking a nested list input in python

This post revolves around taking a sub list as input in python

There can be other efficient ways too :)

Taking a sub list as input mean

[[“John”, “23”], [“Ron”, “24”],[“Alice”, “20”]]

There are two ways by which we can achieve this

1. Using Nested loop (having more complexity)

steps :

1. Take two list , one for storing sublist and other one for storing elements of sublist
2. Take a nested loop to take input of final list as well as sublist
3. after every iteration set the sublist to null
4. Print the list

x=int(input("enter the size of list"))
y= int(input("enter the size of sublist"))
list1=[]
sublist=[]
for i in range(x):
    for j in range(y):
        sublist.append(input())
    list1.append(sublist)
    sublist=[]
print (list1)

2. Without nested loops (this can be used if the elements of the list has not the same type + this has less complexity)

steps:

1. Take two lists one for storing sublist and other one for storing elements of sublist
2. Take a loops and start appending the elements onto the list
3. Set the sublist to null
4. Print the list

x=int(input ("enter the size of list"))
stu=[]
record=[]
for i in range(0,x):

    
    stu.append(input())
    stu.append(input())
    record.append(stu)
    stu = []

print(record)

Output:

enter the size of list3
John
23
Ron
24
Alice
20
[[‘John’, ‘23’], [‘Ron’, ‘24’], [‘Alice’, ‘20’]]

Any suggesions will be hieghly appreciated.