Question

stdin_example.py to read from standard input

Posted on January 15, 2025
Python Scripts
Asked by 4e4da0fb6ddc47698d38708ef00582

Where do I enter the code as displayed in the stdin example? Do I enter this code as a separate python file, or do I put on top of my program code, or maybe at the end of my program code? One of the code examples is:

import sys
for line in sys.stdin:
    if 'Exit' == line.rstrip():
        break
    print(f'Processing Message from sys.stdin *****{line}*****' )
print("Done")

This is one of the codes, so where do I place this code. Thank you.

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Bobby Iliev

Site Moderator

• January 15, 2025

Hey! 👋

The code you shared is designed to read input from standard input, typically used when you want your program to process input provided through the terminal or piped from another program.

Here’s how you can run it:

Save the code in a new Python file, for example, stdin_example.py:

import sys
for line in sys.stdin:
    if 'Exit' == line.rstrip():
        break
    print(f'Processing Message from sys.stdin {line}')
print("Done")

Open your terminal and run the script:
```
python3 stdin_example.py
```
Now, you can type input directly. The script will keep processing your input until you type Exit and press Enter.