Question

Having some trouble on this Python problem. It has 2 parts.

Part 1: Random Number file Writer

Write a program that writes a series of random numbers to a file. Each random number should be in the range of 100 through 500. The application should let the user specify how many random numbers the file will hold.

sample Outputs

Enter the name of the file to which results should be written:

ran_numbers_dude.txt

Enter the number of random numbers to be written to the file: 15

15 random numbers have been written into the output file.

another sample output...

Enter the name of the file to which results should be written:

ran_numbers_johnson.txt

Enter the number of random numbers to be written to the file: 90

90 random numbers have been written into the output file.

Part 2: Average of Numbers with exception handling

Assume that a file containing a series of integers is named numbers.txt and exists on the computers disk. Download this file which is attached. Write a program that calculates the average of all the numbers stored in the file. Make sure that the program should ask a file name to read. (I don't know how to attach the file to this post, so ill just paste the contents of that file below)

22
14
39
109
87
-99
333
78
65
76
292
282
239
cat
392
98
786
981
388
-987
-12
-45
383
381
1
23
40
dog

Modify the program that you wrote so it handles the following exceptions:

1. It should handle any IOError exceptions that are raised when the file is opened and data is read from it.

2.It should handle any ValueError exceptions that are raised when the items that are read from the file are converted to a number.

Check and fix the file by removing non-numeric data. There are two non-numeric data 'cat' and 'dog'.

sample Outputs

Enter a file name: num.txt (file name is wrong)

An error occurred while trying to read the file. No such file exists.

Before fixing the file:

Enter a file name: numbers.text

Non-numeric data found in the file.

After fixing the file:

Enter a file name: numbers.txt

Average: 152.54

Answer 1

import random

file_name = input("Enter the name of the file to which results should be written: ")

n = int(input("Enter the number of random numbers to be written to the file: "))

output = open(file_name,"w")

for i in range(n):

output.write(str(random.randint(100,501)))

output.write("\n")

output.close()

print("{} random numbers have been written into the output file.".format(n))

file_name = input("Enter a file name: ")

try:

read = open(file_name,"r")

#read all lines into list

values = read.readlines()

try:

values = [int(x) for x in values]

s = sum(values)

avg = s/len(values)

print("Average: {:.2f}".format(avg))

except ValueError:

print("Non-numeric data found in the file.")

except FileNotFoundError:

print("An error occurred while trying to read the file. No such file exists.")