#Initializing a 2D list
list = [[10,2,34,56],[122,34,45,67],[23,2232,12]]

#Prints all the lists present inside a list 
print(list)

#prints the second element in the first list
print(list[0][1])

#Prints the fourth element in the second list
print(list[1][3])

#prints the last element in the third list
print(list[2][2])

#Appends data in the third list
list[2].append(100)

#Modifying the value in the third list
list[2][0] = 500

#Prints the modified list after appending and modify the contents in the list 
print("Modified list:",list)

#List iteration for 2D lists 
print()
#Method 1
def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j],end=" ") #Ends with a space instead of a newline 
        print()

#Method 2
def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item,end=" ")
        print()

print("2D List iteration using method 1:")
method1_2D(list)
print("\n2D List iteration using method 2")
method2_2D(list)

#Sorting 2D lists
listSort=[[23,34,341,213],[10,11,4,'bye','hi'],[12]]
print("The 2D list before sorting:",listSort)
print("The 2D list after sorting:")
print(sorted(listSort))

#Different ways to sort a 2D list
listScores=[[6,4,2,1],[6,6,1,2],[2,5,4,3,4,1],[6,1,6,2,6,6,6,6,3]]

print(sorted(listScores,key=sum)) #Sort based on the sum of each list

def avg(listScores):
    return sum(listScores) / len(listScores)

print(sorted(listScores,key=avg)) #Sort based on the average of each list
6f9a24fa9c1cdf0b9f9cccb1366f76aeb40d9e3b
<mask token>


def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j], end=' ')
        print()


def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item, end=' ')
        print()


<mask token>

<mask token>


def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j], end=' ')
        print()


def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item, end=' ')
        print()


<mask token>


def avg(listScores):
    return sum(listScores) / len(listScores)


<mask token>

<mask token>
print(list)
print(list[0][1])
print(list[1][3])
print(list[2][2])
list[2].append(100)
<mask token>
print('Modified list:', list)
print()


def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j], end=' ')
        print()


def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item, end=' ')
        print()


print('2D List iteration using method 1:')
method1_2D(list)
print("""
2D List iteration using method 2""")
method2_2D(list)
<mask token>
print('The 2D list before sorting:', listSort)
print('The 2D list after sorting:')
print(sorted(listSort))
<mask token>
print(sorted(listScores, key=sum))


def avg(listScores):
    return sum(listScores) / len(listScores)


print(sorted(listScores, key=avg))

list = [[10, 2, 34, 56], [122, 34, 45, 67], [23, 2232, 12]]
print(list)
print(list[0][1])
print(list[1][3])
print(list[2][2])
list[2].append(100)
list[2][0] = 500
print('Modified list:', list)
print()


def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j], end=' ')
        print()


def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item, end=' ')
        print()


print('2D List iteration using method 1:')
method1_2D(list)
print("""
2D List iteration using method 2""")
method2_2D(list)
listSort = [[23, 34, 341, 213], [10, 11, 4, 'bye', 'hi'], [12]]
print('The 2D list before sorting:', listSort)
print('The 2D list after sorting:')
print(sorted(listSort))
listScores = [[6, 4, 2, 1], [6, 6, 1, 2], [2, 5, 4, 3, 4, 1], [6, 1, 6, 2, 
    6, 6, 6, 6, 3]]
print(sorted(listScores, key=sum))


def avg(listScores):
    return sum(listScores) / len(listScores)


print(sorted(listScores, key=avg))

#Initializing a 2D list
list = [[10,2,34,56],[122,34,45,67],[23,2232,12]]

#Prints all the lists present inside a list 
print(list)

#prints the second element in the first list
print(list[0][1])

#Prints the fourth element in the second list
print(list[1][3])

#prints the last element in the third list
print(list[2][2])

#Appends data in the third list
list[2].append(100)

#Modifying the value in the third list
list[2][0] = 500

#Prints the modified list after appending and modify the contents in the list 
print("Modified list:",list)

#List iteration for 2D lists 
print()
#Method 1
def method1_2D(list):
    for i in range(len(list)):
        for j in range(len(list[i])):
            print(list[i][j],end=" ") #Ends with a space instead of a newline 
        print()

#Method 2
def method2_2D(list):
    for inner in list:
        for item in inner:
            print(item,end=" ")
        print()

print("2D List iteration using method 1:")
method1_2D(list)
print("\n2D List iteration using method 2")
method2_2D(list)

#Sorting 2D lists
listSort=[[23,34,341,213],[10,11,4,'bye','hi'],[12]]
print("The 2D list before sorting:",listSort)
print("The 2D list after sorting:")
print(sorted(listSort))

#Different ways to sort a 2D list
listScores=[[6,4,2,1],[6,6,1,2],[2,5,4,3,4,1],[6,1,6,2,6,6,6,6,3]]

print(sorted(listScores,key=sum)) #Sort based on the sum of each list

def avg(listScores):
    return sum(listScores) / len(listScores)

print(sorted(listScores,key=avg)) #Sort based on the average of each list