Question

A. Write a Python script so that the user can enter any number of grades. Create a calcavg() function so that it takes the number of grades as a parameter and returns the regular average (not a weighted average). You must loop through the grades for full credit. Add a try/except block so that if a non-numeric value is entered, you get the error message shown below. You cannot use lists.

Input:

c. python …\IT2430\FirstLastname\assign5-2.py 96.7 95.6 87.0

d. python …\IT2430\FirstLastname\assign5-2.py 79.9 79.0 79.7 56.2

e. python …\IT2430\FirstLastname\assign5-2.py 79.0 70.0 stuff

Output:

c. Average: 93.100…

Letter Grade: A

d. Average: 73.7

Letter Grade: C

e. Error. Grade must be numeric.

B. Create a calcbmi() function that takes the height and weight as perimeters and computes a person's BMI at runtime (sys.argv). Create a getcategory() function that takes the BMI as a perimeter and returns the BMI category. The categories are as follows: BMI < 18.5 - underweight; BMI >= 18.5 and BMI <=25 - normal; BMI > 25 and BMI <=30 - overweight; BMI >= 31 - obese. The formula to calculate BMI is: (weight / (height * height ) ) * 703. You must loop through the heights and weights. Also, use a try/except block so an error message appears if the user tries to enter any non numeric input. You cannot use lists.

Input:

a. python …\IT2430\FirstLastname\assign5-3.py 65 120 70 170

b. python …\IT2430\FirstLastname\assign5-3.py 65 120 70

Output: a. BMI: 19.9668…

BMI category is normal.

BMI: 24.3897…

BMI category is normal.

b. Wrong number of arguments provided.

C. Write a script that calculates basic statistics from a list of quarterly sales using a function called calcstats(), that takes the quarterly sales as parameters and prints the outputs shown below. This function should work with any number of sales entered.  Use a try/except block to ensure that all numbers are entered. In addition, ensure that there are the correct number of arguments provided. You cannot use lists.

Input:

a. python …\IT2430\FirstLastname\assign5-4.py 200 100 300 400

b. python …\IT2430\FirstLastname\assign5-4.py 200 100

c. python …\IT2430\FirstLastname\assign5-4.py 200 100 stuff 400 500

Output:

a. Min: $100

Max: $400

Range: $300

Average: $250

b. Min: $100

Max: $200

Range: $100

Average: $150

c. All inputs should be numeric.

Answer 1

Answer 1:

PYTHON CODE:

# Import sys module to read command line arguments using sys.argv
import sys

# calcavg function to return average of grades
def calcavg(n):
   avg = 0
   try:
      # Loop through each grade in command line arguments
      for i in range(1, n + 1):
         avg += float(sys.argv[i])
      # Return average
      return avg / n
   except ValueError:
      print('Error. Grade must be numeric')
      return None

# Call calcavg with number of grades
avg = calcavg(len(sys.argv) - 1)
# Only print if function returned a grade
if avg is not None:
   print('Average:',avg)
   if avg >= 90:
      print('Letter Grade: A')
   elif avg >= 80:
      print('Letter Grade: B')
   elif avg >= 70:
      print('Letter Grade: C')
   elif avg >= 60:
      print('Letter Grade: D')
   else:
      print('Letter Grade: F')

CODE SCREENSHOT:

SAMPLE OUTPUTS: