How to install a simle python script

Question

How do I 'install' a python script so I can run it when ever I want?

My script looks like:

#/usr/bin/env python
import os;

while True:
    comm = input();
    os.system(comm);

But when i try to run it I get:

/usr/bin/doors.py line2: command not found 
...

How to I fix this?

What's the output of stat /usr/bin/doors.py ? You may have not set executable permissions for it — Sergiy Kolodyazhnyy, Apr 28 '16 at 18:16
Also, what i see is that you're trying to run a command via os.system() . It's depreciated. Use subprocess.popen — Sergiy Kolodyazhnyy, Apr 28 '16 at 18:19
Possible duplicate of How can I run this sh script without typing the full path? — Sergiy Kolodyazhnyy, Apr 28 '16 at 18:24
Also, you asked "How do I 'install' a python script so I can run it when ever I want?" , what exactly do you mean by that ? — Sergiy Kolodyazhnyy, Apr 28 '16 at 18:48

score 4 · Answer 1 · edited Apr 29 '16 at 05:32

4

You have a typo in shebang line, which specifies interpreter to use. It should be:

#!/usr/bin/env python

which will default to python2.7. Since you've tagged your question python3, you may want to use:

#!/usr/bin/env python3

You should use the #!/usr/bin/env python3 line .

As it stands now, your shell is interpreting the script with shebang being treated as a comment as it starts with #. Thus, there's no interpreter specified, and by default script will be executed with your current shell. The shell has no idea of what import is , hence the command not found error is being shown by the shell.

As a side note, for running native shell commands in python, use the subprocess module instead of unsecured and deprecated os.system function.

Also why are you running user input blindly without any sanity checking?

edited Apr 29 '16 at 05:32

muru

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answered Apr 28 '16 at 18:18

heemayl

91,753

That should be /usr/bin/env, not /use/bin/env – trvrm Apr 28 '16 at 18:21
1

@trvrm Haha..a typo in my answer too..fixed.. Thanks – heemayl Apr 28 '16 at 18:22
1

OP has tagged the question python3. You might wanna mention that as well, because #!/usr/bin/env python is 2.7 by default – Sergiy Kolodyazhnyy Apr 28 '16 at 18:23
@Serg Edited... – heemayl Apr 28 '16 at 18:30
@heemayl do you mind if I edit it a bit ? – Sergiy Kolodyazhnyy Apr 28 '16 at 18:31
@Serg NP..go ahead :) – heemayl Apr 28 '16 at 18:32
Edit made, let me know what you think – Sergiy Kolodyazhnyy Apr 28 '16 at 18:39
@Serg Thanks, good one..I have added one last line :) – heemayl Apr 28 '16 at 18:42
@Serg until PEP8 changes, /usr/bin/python will be Python 2, not Python 3, even if Python 3 is the only available Python. See https://wiki.ubuntu.com/Python/3 – muru Apr 29 '16 at 05:34

How to install a simle python script

1 Answers1