Question

You have the following list of lists: hr = [ [ 72, 75, 71, 73], # resting [ 91, 90, 94, 93], # walking slowly [ 130, 135, 139, 142], # running on treadmill [ 120, 118, 110, 105, 100, 98] # after a minute recovery ] Each element is the heart rate of a patient. Each sub-list contains heart rates of patients after resting, walking, running, a minute after recovery. Not all sub-lists are of the same length. Write a Python program hr.py where you iterate through the list of lists hr and calculate the average of each sub-list. Append the average of each sub-list to a new list as you iterate through hr. Print this list of average heart rates at the end.

Answer 1

Program:

#list of lists representing the heart rates of a person at differenet situations

#list1 indicates resting time heart rate

#list2 indicates walking slowly time heart rate

#list3 indicates running on treadmill time heart rate

#list4 indicates after a minute recovery time heart rate

hr=[[72,75,71,73],[91,90,94,93],[130,135,139,142],[120,118,110,105,98,100]]

#hr1 is new list to store the averages of abpve sublists

hr1=[]

i=0

#iterating over the sub lists

for i in hr:

    count=0

    sum1=0

    for j in i:

        #calculating the sum of heart rates of sub lists

        sum1=sum1+j

        #counting the number of heart rates in a sub list

        count=count+1

    #finding the average of the sub list and applying the round to get the nearest integer

    average=round(sum1/count)

    #appending the sublists average to a list

    hr1.append(average)

#printing the new list
print("list of average values of sublists")
print(hr1)
#note : i have applied the round() to average values to look the list accurate.
#If you don't need just remove the round()

OUTPUT:

input list of average values of sublists [73, 92, 136, 108] ... Program finished with exit code o Press ENTER to exit console.

#in each element in hr1 list indicates average of that sub list values