This works, although it is not clear what result you want:
marks = [['john',80, 90, 76, 82],['katy', 50, 55, 70, 65],['sydney',80, 72, 88, 90]]
for i in range(len(marks)):
print('Marks for', marks[i][0], ':', end='')
for j in range(1,len(marks[i])):
print(marks[i][j], ', ', sep='', end='')
print('')