Python List Tutorial Day2

1. Transpose of Matrix
2. String Rotation
3. Matrix - sum of all rows, sum of all cols, max number in each row, min in each row
4. Matrix - sum of cols.,sum of leading diagonal

#1. Transpose of Matrix
l = [[10,12],
     [40,2],
     [60,3]]

Transpose = []
i = 0 
j = 0
#print(len(l[i]))
#print(len(l[j]))
while i < len(l[0]):
    list = []
    while j < len(l):
        list.append(l[j][i])
        j+=1
    Transpose.append(list)
    j=0    
    i+=1
print (l ,'Transpose:',Transpose, sep='\n')

#2. String Rotation

word = 'abcdef'
#num = 2 # --> cdefab
#num = 1 # --> bcdefa
#num = -2 # efabcd
#num = -1 # fabcde
num = int(input('Enter the Num:'))
num = num%len(word)
print(word[num:] + word[:num])

#3.Matrix -#List wise Total #List wise Maximum Value, #list wise minimum value

#List wise Total

student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]

for marks_list in student_marks:
    sum = 0
    for mark in marks_list:
        sum = sum + mark
    print(sum, end=' ')
    print()

print("==============================================")


#List wise Maximum Value

student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]

for marks_list in student_marks:
    max = 0
    for mark in marks_list:
        if mark > max:
            max = mark
    print('Max:',max, end=' ')
    print()

print("=============================================")

#list wise minimum value 


for marks_list in student_marks:
    min = marks_list[0]
    for mark in marks_list:
        if mark < min:
            min = mark
    print('Min:',min, end=' ')
    print()

 #4. Matrix - sum of cols,sum of leading diagonal
student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]
#Sum of all columns 
#10+40+70
#20+50+80
#30+60+90
i = 0
j = 0
sum = 0
while j < len(student_marks):
    sum =0
    i=0
    while i < 3:
        sum = sum + student_marks[i][j]
        i+=1
    j+=1
    print('sum:',sum)


print('=======================================================')

#10+50+90
j = 0
sum = 0
while j < len(student_marks):
    sum = sum + student_marks[j][j]
    print(student_marks[j][j], end =' ')
    j+=1
print('sum:',sum)


print('=======================================================')
#30+50+70
i = 2
j = 0
sum = 0
while j < len(student_marks):
    sum = sum + student_marks[j][i]
    print(student_marks[j][i], end =' ')
    i-=1
    j+=1
print('sum:',sum)