Problem: to run one.py from a server.
Error
When I try to do it in Mac, I get errors:
$python http://cs.edu.com/u/user/TEST/one.py ~
/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python: can't open file 'http://cs.edu.com/u/user/TEST/one.py': [Errno 2] No such file or directory
one.py is like:
print 1
When I do it in Ubuntu, I get "file is not found".
Question: How can I run Python code from a server?
So far as I know, the standard Python shell doesn't know how to execute remote scripts. Try using curl or wget to retrieve the script and run it from the local copy.
$ wget http://cs.edu.com/u/user/TEST/one.py
$ python one.py
UPDATE: Based on the question referenced in the comment to this answer, you need to execute one.py based on incoming HTTP requests from end users. The simplest solution is probably CGI, but depending on what else you need to do, a more robust solution might involve a framework of some sort. They each have there strengths and weaknesses, so you should probably consider your requirements carefully before jumping in.
You can't do this. If you have SSH access to the server you can then run the python script located on the server using your SSH connection. If you want to write websites in python google python web frameworks for examples of how to set up and run websites with Python.
wget http://cs.edu.com/u/user/TEST/one.py
python one.py
You can mount the remote servers directory with some sort of file networking, like NFS or something. That way it becomes local.
But a better idea is that you explain why you are trying to do this, so we can solve the real usecase. There is most likely tons of better solutions, depending on what the real problem is.
The python interpreter doesn't know how to read from a URL. The file needs to be local.
However, if you are trying to get the server to execute the python code, you can use mod_python or various kinds of CGI.
You can't do what you are trying to do the way you are trying to do it.
Maybe something like this?
python -c "import urllib; eval(urllib.urlopen(\"http://cs.edu.com/u/user/TEST/one.py").read())"
OK, now when you explained, here is a new answer.
You run that script with
python one.py
It's a server side-script. It's run on the server. It's also located on the server. Why you try to access it via http is beyond me. Run it from the file system.
Although, you should probably look into running Grok or Django or something. This way you'll just end up writing your own Python web framework, you may just as well use one that exists instead. ;)
Related
I am building a python script which needs to run infinitely on a server. It will access a Microsoft Exchange server and read mails, process them and trigger automated voice calls.
I have successfully implemented the automated call action. Presently the script runs on my PC. I have three questions.
For running the script on a server instead of PC, does the syntax of the code other than connecting to the server needs to change? I mean, the parts where I'm reading mails and triggering calls, does that need to be changed? Or can the same script run on a server? If it does need change, can somebody please attach what changes need to be done.
Since I need to run the script on a server, and access a Microsoft Exchange server, can the script be run on the Exchange server itself? If yes, please attach helpful resources.
The script does not take any input as such, but it accesses a couple of files that need to edited manually from time to time. How should I achieve that?
The distinction between PC and Server doesn't matter. Your script will require a set of resources and may make assumptions about the OS it's running on. Those are the things that matter. As long as the required resources are there, it should run fine. For example, if your script requires Python 3.6+ to run, then you must have Python 3.6+ installed on either the Server/PC. If you are using a particular python package, then it should be installed. If you make assumptions about where files are located on disk, those paths either need to be OS independent, or match the OS of the Server/PC, and those files need to be there. But the syntax of the python shouldn't change.
If your goal is to run the python server as a service on the server, then more information about what type of server (windows/linux) is required. Assuming you are considering running it on an exchange server, I suppose it's most likely you'll want to run on Windows. This has been asked and answered here. In relation to your code, you will want to make sure your script can be handled as a library, and you won't want to call sys.exit inside your code, but should rely on exceptions to pass up errors. My preferred pattern is something like
def main(argv=None):
# parse arguments if you have them and run the script
if __name__ == '__main__':
main()
Then in your service you can import and call main(...) without running another executable.
See #1. Whether it can run on that server depends on whether all of the required resources and files are available there. There is possibly a question of whether you would WANT to run the script on your exchange server. That answer depends on the load the script takes, how busy/active your server is, Whether you want the extra software installed on your server, etc.
Your best solution here will depend on your situation. If you can login and edit the files, then maybe that's what you do. If you want to edit them on your PC and then push them up, then there are solutions for that. All depends on what makes sense for your project/situation.
My question is more theoretical than anything.
What I have:
Linux machine
A python script that runs an entire suite of tests.
The same script prints out all of the information to the terminal.
Currently, the way we run our software suite is via SSH to the machine, running python3 MyScript.py and then checking the output.
My goal is to create an interface that would work on a Linux/Windows machine and tablet, and would be able to execute the script, as well as visually display progress of it.
I figured, the best approach (also possibly the easiest?) is to use a web server. Web Interface is fairly universal regardless of platform it is being accessed from. And the backend is as simple as apt get install apache2 and voila! Done!
However, I have never had experience setting up cgi-bin, etc. My question is: is it actually feasible? Am I able to have an HTML button that when clicked will execute MyScript.py server-side and perhaps even parse through whatever the script is outputting to the terminal. That way I would know exactly what the script is doing, and its progress.
Any help regarding this approach (or technologies I can use) is greatly appreciated!
I've studied Python and Django, building a homepage.
And I've been using a virtual memory on Ubuntu server(apache2 2.4.18/ php-7.0/ MariaDB 10.0.28 with phpMyAdmin/ FTP) offered for developers.
The server hadn't allowed users to use python, but I asked the server administrator to give me a permission and I got it.
The problem was, however, that I was not allowed to use not only any sudo command line but also basic commands like apt-get and python.
The only administrator can do so, therefore it seems that I cannot install any neccessary things-virtualenv, django, and so on- by myself.
Just to check whether .py file works or not, I added <?php include_once"test.py" ?> on the header of index.php about the test.py where only print "python test"(meaning only python 2 is installed on this server) is written. It works. That is, I guess, all I can do is uploading .py file with Filezilla.
In this case, can I make a homepage with Python on this server efficiently? I was thinking about using Bottle Framework, but also not sure.
I am confused with wondering whether I should use PHP on this server and using Python on PythonAnywhere in the end.
I am a beginner. Any advice will be appreciated :)
Have you thought about asking the admin to start a virtualenv for you and give you permissions to work in that environment?
I have tried searching online like crazy with no avail. PHP is as simple as naming the file .php and writing PHP. I know people say it's that simple for Python, but I have found no useful guides in setting it up. I merely want to practice Python on my computer via WAMP or another alternative. I am on Windows Vista.
I cannot get .py files to execute correctly. The actual text:
print("Hello!")
Appears just as that rather than "Hello!". I don't know what to do to make it actually work in my browser.
Any help or pointing towards guides would be greatly appreciated.
PHP does not execute in the browser. It is executed on the server side then the output is sent by the web server to the browser.
If you want a simple way to use Python to process web requests take a look at web.py (http://webpy.org).
Your server should handle Python code. Take a look at framework Django. And as for servers I can suggest you http://webfaction.com
I'm new to Python (relatively new to programing in general) and I have created a small python script that scrape some data off of a site once a week and stores it to a local database (I'm trying to do some statistical analysis on downloaded music). I've tested it on my Mac and would like to put it up onto my server (VPS with WiredTree running CentOS 5), but I have no idea where to start.
I tried Googling for it, but apparently I'm using the wrong terms as "deploying" means to create an executable file. The only thing that seems to make sense is to set it up inside Django, but I think that might be overkill. I don't know...
EDIT: More clarity
You should look into cron for this, which will allow you to schedule the execution of your Python script.
If you aren't sure how to make your Python script executable, add a shebang to the top of the script, and then add execute permissions to the script using chmod.
Copy script to server
test script manually on server
set cron, "crontab -e" to a value that will test it soon
once you've debugged issues set cron to the appropriate time.
Sounds like a job for Cron?
Cron is a scheduler that provides a way to run certain scripts (apps, etc.) at certain times.
Here is a short tutorial that explains how to set up cron.
See this for more general cron information.
Edit:
Also, since you are using CentOS: if you end up having issues with your script later on... it could partly be caused by SELinux. There are ways to disable SELinux on your server (if you have enough access permissions.) But... there are arguments against disabling SELinux, as well.