Question

The attached numberpairs.csv file contains lines of comma-separated number pairs, e.g.

2.0,1
5.5,2
10,0
5.1,9.6

• Write a program which reads the file using the Python CSV module, creates a list from the contents, then divides the first number in each line by the second.
• Define a function in your program that performs the division operations; the function must accept two numeric parameters, divide the first parameter by the second, and return the result. Before dividing, your function must validate the second parameter; if it is zero, raise a ZeroDivisionError exception which includes the string "denominator is zero!" as a parameter instead of processing the division operation. Do not display any output in your function.
• Define a second function which reads the CSV file and returns the list of number pairs.
• Your main function must call the file reader function, then process the list by calling your divide function repeatedly and displaying the results (include the contents of the raised exception object, if applicable).

Expected Output:

2.0 divided by 1.0 is 2.0
5.5 divided by 2.0 is 2.75
10.0 divided by 0.0 error: denominator is zero!
5.1 divided by 9.6 is 0.53125

What is the file name I should save this under for the CSV file to run properly I keep getting an error when trying to run the code?

Answer 1

check out the solution.

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CODE :

# Python program - readCSVDemo.py
import csv

# divide function implementation
def divide(n1, n2):
# raise an exception
if(n2 == 0):
raise ZeroDivisionError("denominator is zero!")
  
# perform division and return result
result = n1/n2
return result

def read():
lst = [] # initialize a list
# open csv file with read mode
with open('numberpairs.csv','r')as f:
data = csv.reader(f) # read file contents
for row in data:
lst.append(row) # append each row to list
  
return lst # return the list

# main function
def main():
# function call
lst = read()
  
for line in lst:
# as divide function raise an exception, use try-except block
try:
# get each number from each line and convert it into float
n1 = float(line[0])
n2 = float(line[1])
result = divide(n1, n2) # function call
print(f'{n1} is divided by {n2} is {result}') # print result
except ZeroDivisionError as z: # exceptions are handled here
print(f'{n1} is divided by {n2} error: {z}') # print accordingly
  
# main calls
if __name__ == "__main__":
main()

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OUTPUT :

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