程序代写代做代考 Programming Exercise 3-1

Programming Exercise 3-1

Programming Exercise 7-5
def main():

# Local variables

test_account = ”

try:

# Open the file for reading

input_file = open(‘charge_accounts.txt’, ‘r’)

# Read all the lines in the file into a list

accounts = input_file.readlines()

# Strip trailing ‘\n’ from all elements of the list

for i in range(len(accounts)):

accounts[i] = accounts[i].rstrip(‘\n’)

# Get user input

test_account = input(‘Enter the account number to be validated: ‘)

# Use in operator to search for the account specified by user

if test_account in accounts:

print(‘Account number’, test_account, ‘is valid.’)

else:

print(‘Account number’, test_account, ‘is not valid.’)

except IOError:

print(‘The file could not be found’)

except:

print(‘An error occurred’)

# Call the main function.

main()