Question

My program crashes on the line (print('\nThe maximum value from the file is {}'.format(max(i)))) with the error message TypeError: "int" object not iterable. The purpose of this program is to create an process binary files. Can you tell me what's going wrong?

Thanks!

( *'s indicate indentation)

from sys import argv
from pickle import dump
from random import randint
from pickle import load

if (argv[1] == 'c'):

****output_file = open(argv[2], 'wb')
****for i in range(int(argv[3])):
********dump(randint(int(argv[4]), int(argv[5])), output_file)
****output_file.close()

****print('{} random integer values have been written to the file {}.'
****.format(argv[3], argv[2]))
****print('Program now terminating.')
****input('Press Enter to continue ... ')
****print()

elif (argv[1] == 'p'):
****num_spaces = 1
****input_file = open(argv[2], 'rb')

****while True:
******try:
********i = load(input_file)
********print('\nThe maximum value from the file is {}'.format(max(i)))    #This is where the error occurs
********print('The minimum value from the file is {}'.format(min(i)))
********print('The sum of the values from the file is {}'.format(sum(i)))
********print('The average of the values from the file is'
********' %.2f' % (sum(i) / len(i)))
********print("Here are the integers from integers.dat:")
********print()
********print('And here are all the values from the file, sorted ascending'
********',\n with a maximum of 10 per line, and with each value in'
********' {} spaces:'.format(num_spaces))

********print(i, end=' ')

****except EOFError:
******input_file.close()
******break
****print('\nProgram now terminating.')
****input("Press Enter to continue ... ")
****print()

Also all instructions are given from the cmd prompt.

Answer 1

$ python x.py c input 10 4 40 10 random integer values have been written to the file input. Program now terminating. Press Enter to continue .. a 958905@A958905-LTW10 /cygdrive/c/Users/a958905/Desktop/test a958905@A958905-LTW10 /cygdrive/c/users/a958905/Desktop/test $ python x.py p input [27, 6, 26, 27, 11, 30, 30, 30, 15, 40] The maximum value from the file is 40 The minimum value from the file is 6 The sum of the values from the file is 242 The average of the values from the file is 24.20 Here are the integers from integers.dat: And here are all the values from the file, sorted ascending with a maximum of 10 per line, and with each value in 1 spaces: [27, 6, 26, 27, 11, 30, 30, 30, 15, 40] Program now terminating. I Press Enter to continue ...

from sys import argv
from pickle import dump
from random import randint
from pickle import load

if (argv[1] == 'c'):

    output_file = open(argv[2], 'wb')
    data = []
    for i in range(int(argv[3])):
        data.append(randint(int(argv[4]), int(argv[5])))
    dump(data, output_file)
    output_file.close()

    print('{} random integer values have been written to the file {}.'.format(argv[3], argv[2]))
    print('Program now terminating.')
    input('Press Enter to continue ... ')
    print()

elif (argv[1] == 'p'):
    num_spaces = 1
    input_file = open(argv[2], 'rb')

    while True:
        try:
            i = load(input_file)
            print('\nThe maximum value from the file is {}'.format(max(i)))    #This is where the error occurs
            print('The minimum value from the file is {}'.format(min(i)))
            print('The sum of the values from the file is {}'.format(sum(i)))
            print('The average of the values from the file is' ' %.2f' % (sum(i) / len(i)))
            print("Here are the integers from integers.dat:")
            print()
            print('And here are all the values from the file, sorted ascending\n with a maximum of 10 per line, and with each value in {} spaces:'.format(num_spaces))

            print(i, end=' ')

        except EOFError:
            input_file.close()
            break
        
    print('\nProgram now terminating.')
    input("Press Enter to continue ... ")
    print()

**************************************************
I have corrected the code.. You were doing multiple dumps. you should dump the whole list. If you dump only a number at a time, then you are reading only a integer in loads method. Hence max(integer) gives you error, because max works on list, not on integers.

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