As OriginalGriff said, this is not a coding service. If you want more help at least show what you've tried.
This will do it:
quiz = input('Enter quiz marks: ')
assignment = input('Enter assignment marks: ')
midexam = input('Enter mid marks: ')
finalexam = input('Enter final marks: ')
practical = input('Enter lab marks: ')
internalmarks = int(quiz) + int(assignment)
exammarks = int(midexam) + int(finalexam)
theory = internalmarks + exammarks
totalmarks = theory + int(practical)
print("Asif's total marks for a course is: " + str(totalmarks))
Next time show some effort :).
EDIT: Why the downvotes? Does it not say: "Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question."
? Which, I might add, is exactly what the first answer is.