Question

I am attempting to make a string an integer by saying

file = open(input("Please enter the name of the file you wish to open:" ))
while True:
    A = file.readline() 
    if(A):
        array.append(int(A[0:len(A)-1]))
    else:
        break
print("The numbers in the file are:", A)
file.close()

The file I created has numbers: 1 -3 10 6 5 0 3 -5 20

Here is the error:

ValueError: invalid literal for int() with base 10: '1 -3 10 6 5 0 3 -5 2'

Answer 1

Read the error – '1 -3 10 6 5 0 3 -5 2' is not a number. It’s a list of numbers. You need to turn it into a list of strings first.

Also,you shouldn’t really use .close(). Use with instead.

fname = input("Please enter the name of the file you wish to open:" )
with open(fname) as f:
    for line in f:
        a = [int(num) for num in line.split()]
        print a