"python -i print_content.py < file.txt" exits interactive mode

Asked May 06 '17 at 22:05

Active May 06 '17 at 22:05

Viewed 41 times

python -i <script.py> is theoretically meant to run script.py and proceed into interactive mode, however:

shell$ python -i print_content.py < file.txt
hello world

>>>
shell$

The script runs successfully and is followed by printing >>>, implying that the Python shell is entered following script execution.

I know I could bypass the issue by opening the file from within the script - I'm more curious to know the cause of the issue.

Note: Contents of print_content.py seem innocent enough:

import sys
for i in sys.stdin:
    print i

Note: I'm using Python 2.7.3

asked May 06 '17 at 22:05

Gylmar

Interactive mode gets its input from stdin. – Ry- May 06 '17 at 22:14
@Ryan Right, and wouldn't `< file.txt` be providing such input? – Gylmar May 06 '17 at 22:21
Your script reads `sys.stdin` to the end, and stdin reads from `file.txt`. Python runs the script, stdin is read, and there’s nothing left for the interactive session when it starts. – Ry- May 06 '17 at 22:24
Thank you for the response! – Gylmar May 19 '17 at 17:50

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