When user enter “stop”, write the strings to file

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How to Read lines of input from the user. When the user enters “stop”, write all the strings to a file. The string entered last should be written first in the file. Each string should be written as a single line in the file.

What I have tried:

Python

textfile = open("jkl.txt","w")
lines=""
while lines!="stop":
    lines = input("Enter lines of input: ").split()
    if "stop" not in lines:
        for line in reversed(lines):
            textfile.writelines(line)
    else:
            break

Posted 18-Jan-22 21:43pm

Nandini Sathyan S

Updated 19-Jan-22 8:52am

OriginalGriff

v2

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CHill60 19-Jan-22 3:50am

That's what your code appears to do. What is the problem or question?

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OriginalGriff · Answer 1 · 2022-01-18T22:33:00

The Python input function reads a line at a time from the user, not multiple lines - so each time round your loop, you read a single line, check if it is "stop" and print it reversed (which does nothing for a single line) to your output file.

What you need to do is read lines in a loop until you get stop, storing each line into a collection as you go.
After that loop, you can reverse the collection and write your lines in reverse order to the file, but not until then!

_Asif_ · Answer 2 · 2022-01-19T08:52:00

Try this, should give you an idea

Python

stack = []
lines=''
textfile = open("jkl.txt","w")
while lines!='stop':
    lines = input("Enter lines of input: ")
    if lines == 'stop':
        while len(stack) > 0: 
            outString = stack.pop() + '\n'
            textfile.write('outString')
            print(outString)
    else:
        stack.append(lines)

When user enter “stop”, write the strings to file

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