如何让linux在Python解释器中自动运行我的python脚本？

Question

I've decided that it would be good for me to move outside of my .NET bubble and start experimenting with other technologies. I have Ubuntu12 running and python2.7 and 3.2 are installed. I can run code directly in the interpreters.

I have a basic script on the filesystem called Standalone.py:

#!/usr/bin/env python3.2

import sys

print("this is a standalone script.")

When I'm at my bash prompt I type $ python3.2 Standalone.py . I get a response saying this is a standalone script . But when I type $ Standalone.py then it tells me that the command is not found.

How do I run such scripts?

Thanks for any help.

update

I changed the permissions of Standalone.py to 755. Then I ran the command:

$ ./Standalone.py

and received the message:

: No such file or directory

I then switched the permissions of Standalone.py back to 644. Then when I ran

$ ./Standalone.py

I received the message

-bash: ./Standalone.py: Permission denied

Is there something I'm missing?

Answer 1

1. You need to make the script executable using

    chmod +x Standalone.py 

2. Usually, the current directory is not searched for executable files, so you need to use

    ./Standalone.py 

   to tell the shell that the script is in the current directory.

Answer 2

Make sure your script file has linux newline (just \\n ) not windows newline ( \\r\\n ). Did you write the script on windows? This happened to me once. You should check your editor settings.

Answer 3

1. Your script should start with #!/usr/bin/python not #!/usr/bin/env python3.2

2. Make sure you're in the folder where your script is located you can check with ls

3. chmod +x Standalone.py

4. ./Standalone.py

Answer 4

At first, to excecute a script it need to be executable. So you either have to do a chmod +x $file or a chmod 0740 $file. When you set the file permission to 644 you are putting the execute right away, so if gives you an error. If you are unsure of execution right and octal notation, you can use this : http://permissions-calculator.org/decode/0644/ . To really answer your question then, if you want to call the script with $file.py it needs to be in your PATH variable. You can display it with echo $PATH. Those are the directories that are searched for script to execute. So you simply need to give your script the executable right and put it in one of the directory given by your PATH.

Answer 5

Can you check if /usr/bin/python or /usr/bin/python3.2 exists

Execute below comamnd:

which python3.2

and then use the resulting path on top of you script.