Write a python program that reads the contents of the charge_accounts.txt file i

Question

Write a python program that reads the contents of the charge_accounts.txt file into a list. The program should then ask the user to enter a charge account number, each account number is 7 digits long. The program should determine whether the number is valid by searching for it in the list. If the number is in the list, the program should display a message indicating the number is valid. If the number is not in the list, the program should display a message indicating the number is invalid.

The program should have the following functions:
main function - controls the overall flow of the program.
getList function - reads the charge_accounts. txt file into a list and returns the list.

See a sample program execution below:

Explanation / Answer

def main():

   try:

       # Get the possible charge account number
       possAccountNumber = int(input('Please enter a charge account nubmer: '))

       # Open the file of charge account numbers and read them into a list while stripping off the and making it an int
       validNumbers = open('charge_accounts.txt', 'r')
       validList = []
       for accountNumber in validNumbers:
           validList.append(int(accountNumber.rstrip(' ')))

       # Search for the possAccountNumber in the validList
       if possAccountNumber not in validList:
           print('The account number you are looking for does not exist. Please try another.')
       else:
           print('You have entered a valid account number.')

       # Close the account number file
       validNumbers.close()

   # Except error where a string is entered.
   except ValueError as err:
       print('You have entered an invalid account number.')
       print('The error message is displayed below.')
       print(err)

   except IOError as err:
       print('The charge_accounts.txt file cannot be located.')
       print('Please verify that it exists and is named correctly')

   except Exception as err:
       print('An unknown error has occured.')
       print(err)

main()

charge_accounts.txt

5658845
4520125
7895122
8777541
8451277
1302850
8080152
4562555
5552012
5050552
7825877
1250255
1005231
6545231
3852085
7576651
7881200
4581002

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