for loop - Python alphanumeric

Question

Problem:

I have to go through text file that has lines of strings and determine about each line if it is alphanumeric or not. If the line is alphanumeric print for example "5345m345?34l is alphanumeric"

Example of the text file:

5345m345?34l 

no2no123non4 

%#""SGMSGSER 

My code is as follows:

file = open('file.txt','r')
data = file.readlines()

for i in data:
    i.strip()
    if (i.isalnum()):
        print (i, 'is alphanumeric')
    else:
        print (i, 'not alphanumeric')
    file.close()

We can see that the first and second line is alphanumeric but the program doesn't work?

Answer 1

try this and see if this working -

file = open('file.txt','r')
data = file.readlines()

for i in data:
    stripped_line = i.strip()
    if (stripped_line.isalnum()):
       print (stripped_line, 'is alphanumeric')
    else:
       print (stripped_line, 'not alphanumeric')
file.close()