Assignment overview This lab exercise provides practice with file processing You
ID: 3845245 • Letter: A
Question
Assignment overview This lab exercise provides practice with file processing You will work with a partner on this exercise during your lab session. Two people should work at one computer. occasionally switch the person who is typing. Talk to cach other about what you are doing and why so that both of you understand each step. Part A: Data Processing Given a data file, find the max, min, and average values of columns. Also, create an addition column that is based on the other columns. There will be no error checking required for this lab. You are provided with a data file named (surprise!) data. txt. Data is arranged in columns where each item of data is twelve columns wide (so it is casy to extract data items using slicing): Name Height (m) Weight (kg) 1.82 72.57 Joe 1.60 63.50 Mary Dion 1.90 90.71 1.72 66.31 Kayla Jose 1.78 70.23 1.63 65.12 Sofia Erik 1.98 92.21 1.57 65.77 Sara Your task is read the file data.txt and calculate the max, min, and average of the height and weight columns and to add an additional column that has the BMI calculated based on each height and weight. Your output will look like this (and needs to be formatted like this). To match the testing on Mirmir here is the format string: "I:Explanation / Answer
PART A:
Code:
#!/usr/local/bin/python3
# program to calculate BMI
def main():
# opening the file data.txt
with open("data.txt") as fp:
# initializing the variables
(max_weight, min_weight, sum_weight, avg_weight) = (0, 10**9, 0, 0)
(max_height, min_height, sum_height, avg_height) = (0, 10**9, 0, 0)
(max_bmi, min_bmi, sum_bmi, avg_bmi) = (0, 10**9, 0, 0)
n = 0
for line in fp:
# printing the header
if 'Name' in line:
print ("{:<12s} {:<12s} {:<12s} {:<12s}".format('Name', 'Height(m)', 'Weight(kg)', 'BMI'))
else:
# splitting the line from file and storing into variables
(name, height, weight) = line.split()
# converting weight and height as float variables
weight = float(weight)
height = float(height)
# identifying max and min from the weight numbers
if weight > max_weight:
max_weight = weight
if weight < min_weight:
min_weight = weight
sum_weight = sum_weight + weight
# identifying max and min from the height numbers
if height > max_height:
max_height = height
if height < min_height:
min_height = height
sum_height = sum_height + height
# calculating bmi and identifying min and max from the bmi numbers
bmi = weight / height ** 2
if bmi > max_bmi:
max_bmi = bmi
if bmi < min_bmi:
min_bmi = bmi
sum_bmi = sum_bmi + bmi
n = n + 1
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format(name, height, weight, bmi))
# calculating average weight, height and bmi
avg_weight = sum_weight / n
avg_height = sum_height / n
avg_bmi = sum_bmi / n
print (" ")
# printing average, max, min statistics
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Average', avg_height, avg_weight, avg_bmi))
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Max', max_height, max_weight, max_bmi))
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Min', min_height, min_weight, min_bmi))
fp.close()
if __name__=='__main__':
main()
Execution and output:
Unix Terminal> cat data.txt
Name Height(m) Weight(kg)
Joe 1.82 72.57
Mary 1.60 63.50
Dion 1.90 90.71
Kayla 1.72 66.31
Jose 1.78 70.23
Sofia 1.63 65.12
Eric 1.98 92.21
Sara 1.57 65.77
Unix Terminal> python3 lab06a.py
Name Height(m) Weight(kg) BMI
Joe 1.82 72.57 21.91
Mary 1.60 63.50 24.80
Dion 1.90 90.71 25.13
Kayla 1.72 66.31 22.41
Jose 1.78 70.23 22.17
Sofia 1.63 65.12 24.51
Eric 1.98 92.21 23.52
Sara 1.57 65.77 26.68
Average 1.75 73.30 23.89
Max 1.98 92.21 26.68
Min 1.57 63.50 21.91
PART B:
Code:
#!/usr/local/bin/python3
# program to calculate BMI
script name: lab06b.py
def main():
# opening the file out.txt for writing the output
outfile = open("output.txt", "w")
# opening the file data.txt for reading
with open("data.txt") as fp:
# initializing the variables
(max_weight, min_weight, sum_weight, avg_weight) = (0, 10**9, 0, 0)
(max_height, min_height, sum_height, avg_height) = (0, 10**9, 0, 0)
(max_bmi, min_bmi, sum_bmi, avg_bmi) = (0, 10**9, 0, 0)
n = 0
for line in fp:
# printing the header
if 'Name' in line:
print ("{:<12s} {:<12s} {:<12s} {:<12s}".format('Name', 'Height(m)', 'Weight(kg)', 'BMI'), file=outfile)
else:
# splitting the line from file and storing into variables
(name, height, weight) = line.split()
# converting weight and height as float variables
weight = float(weight)
height = float(height)
# identify max and min from the weight numbers
if weight > max_weight:
max_weight = weight
if weight < min_weight:
min_weight = weight
sum_weight = sum_weight + weight
# identifying max and min from the height numbers
if height > max_height:
max_height = height
if height < min_height:
min_height = height
sum_height = sum_height + height
# calculating bmi and identifying min and max from the bmi numbers
bmi = weight / height ** 2
if bmi > max_bmi:
max_bmi = bmi
if bmi < min_bmi:
min_bmi = bmi
sum_bmi = sum_bmi + bmi
n = n + 1
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format(name, height, weight, bmi), file=outfile)
# calculating average weight, height and bmi
avg_weight = sum_weight / n
avg_height = sum_height / n
avg_bmi = sum_bmi / n
print (" ", file=outfile)
# printing average, max, min statistics
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Average', avg_height, avg_weight, avg_bmi), file=outfile)
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Max', max_height, max_weight, max_bmi), file=outfile)
print ("{:<12s} {:<12.2f} {:<12.2f} {:<12.2f}".format('Min', min_height, min_weight, min_bmi), file=outfile)
fp.close()
outfile.close()
if __name__=='__main__':
main()
Execution and output:
Unix Terminal> python3 lab06b.py
Unix Terminal> cat output.txt
Name Height(m) Weight(kg) BMI
Joe 1.82 72.57 21.91
Mary 1.60 63.50 24.80
Dion 1.90 90.71 25.13
Kayla 1.72 66.31 22.41
Jose 1.78 70.23 22.17
Sofia 1.63 65.12 24.51
Eric 1.98 92.21 23.52
Sara 1.57 65.77 26.68
Average 1.75 73.30 23.89
Max 1.98 92.21 26.68
Min 1.57 63.50 21.91
Unix Terminal>
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