15110 Sample Lab Exam 2 Answers
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from tkinter import *

def target(c):
    c.create_oval(75,75,375,375,fill="red",outline="red")
    c.create_oval(125,125,325,325,fill="white",outline="white")
    c.create_oval(175,175,275,275,fill="red", outline="red")
    
def strsizes(filename):
    inputfile = open(filename, 'r')
    lengthlist = []
    for line in inputfile:
        lengthlist.append(len(line[0:-1]))
    return lengthlist

def product(numlist):
    if len(numlist) == 0:
        return 1
    else:
        return numlist[0] * product(numlist[1:len(numlist)])

def sumints(matrix):
    sum = 0
    for row in range(len(matrix)):
        for col in range(len(matrix[row])):
            if type(matrix[row][col]) == int:
                sum = sum + matrix[row][col]
    return sum