students = [('Alice', 2016), ('Bob', 2017), ('Charlie', 2017)]

def print_student_years(student_list):
    '''print the class year of each student in students'''
    for (name, year) in student_list:
        print("student name is " + name + ", year is " + str(year))       

def print_list(some_list):
    '''print out the indices and corresponding elements of some_list'''
    for i in range(0, len(some_list)):
        print("index ", i, " is ", some_list[i])
        
grades = [74, 83, 76, 88, 80]

def scale_grades_copy(grade_list):
    '''returns a copy of the grades in grade_list scaled up by 10%'''
    scaled_grades = []
    for grade in grade_list:
        scaled_grades.append(round(grade * 1.1))
    return scaled_grades

def scale_grades(grade_list):
    '''scale the grades in grade_list up by 10%'''
    for i in range(0, len(grade_list)):
        grade_list[i] = round(grades[i] * 1.1)

import time        

def print_mult_table():
    '''print out a multiplication table from 1 to 4'''
    for row_num in range(1, 10):
        for col_num in range(1, 10):
            print(col_num * row_num, end='\t')
            time.sleep(0.5)
        print() # end the current row