Running Python script from Azure WebJob

Question

I'm trying to run python script from Azure webjob. This is what I've done following this link

1. Access the kudu tool via the url https://<webapp name>.scm.azurewebsites.net and installed Python 364x86 via Site Extensions tab
2. Confirmed Python 364x86 is installed in the following path: D:\home\python364x86
3. Added my script trading.py in D:\home\python364x86
4. Created run.bat file with this line of code D:\home\python364x86\python.exe trading.py
5. Included run.bat and trading.py in the webjob zip file
6. Deployed, but getting error

[09/07/2019 07:02:00 > 0dd02c: SYS INFO] Status changed to Initializing
[09/07/2019 07:02:00 > 0dd02c: SYS INFO] Run script 'run.bat' with script host - 'WindowsScriptHost'
[09/07/2019 07:02:00 > 0dd02c: SYS INFO] Status changed to Running
[09/07/2019 07:02:00 > 0dd02c: ERR ] The filename, directory name, or volume label syntax is incorrect.
[09/07/2019 07:02:00 > 0dd02c: INFO] 
[09/07/2019 07:02:00 > 0dd02c: INFO] D:\local\Temp\jobs\triggered\z\2az54ret.wh4>D:\home\python364x86\python.exe trading.py 
[09/07/2019 07:02:00 > 0dd02c: SYS INFO] Status changed to Failed
[09/07/2019 07:02:00 > 0dd02c: SYS ERR ] Job failed due to exit code 1

Functions.cs

public void StartTheBot()
        {        
            // Local   
            //var fileName = @"C:\Users\robert\AppData\Local\Programs\Python\Python37-32\python.exe";
            //var script = @"C:\python-scripts\trading.py";

            // Production
            var fileName = @"D:\home\python364x86\python.exe";
            var script = @"D:\home\python364x86\trading.py";
            var errors = "";
            var results = "";        

            ProcessStartInfo psi = new ProcessStartInfo
            {
                FileName = fileName,
                Arguments = script,
                UseShellExecute = false,
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                CreateNoWindow = true
            };            

            using (Process process = Process.Start(psi))
            {
                errors = process.StandardError.ReadToEnd();
                results = process.StandardOutput.ReadToEnd();               
            }

            Console.WriteLine("Errors:");
            Console.WriteLine(errors);
            Console.WriteLine();
            Console.WriteLine("Results:");
            Console.WriteLine(results);
        }

Above code executes python script. It works locally, but once I deploy it to production it fails. Tried so many times, spent plethora of hours, but still unsure why prod doesn't work. Help is appreciated.

trading.py

import telegram

my_token = 'mytoken'
bot = telegram.Bot(token = my_token)

chat_id = 'mychatid'
message = 'Hello
bot.sendMessage(chat_id=chat_id, text=message)

Answer 1

I tried to realize your needs with Python in WebJob and successfully make it work.

Here are my steps and sample code. My local environment is Python 3.7 on Windows 10.

1. Create a Python virtual environment and install python-telegram-bot package via commands as below.

    $ mkdir telegram-webjob
    $ virtualenv telegram-webjob
    $ cd telegram-webjob
    $ Scripts\active
    $ pip install python-telegram-bot
    $ pip freeze
   

2. I changed your code as my sample code, then run it works fine on local, as below.

   import telegram
   from datetime import datetime as dt
   
   my_token = '<my token>'
   bot = telegram.Bot(token = my_token)
   
   chat_id = '<chat id>'
   message = f"Hello at {dt.now()}"
   bot.sendMessage(chat_id=chat_id, text=message)
   

3. I created a new directoy named webjob and copied my trading.py file and all directories with their files into it, as below.

4. Write the startup bat script named run.bat, the code as below.

    D:\home\python364x86\python.exe trading.py
   

The D:\home\python364x86\python.exe path is the python364x86 site extension installed path as the figure below.

5. Then, I packaged the all directories and files in the webjob directory as a zip file, as below.

6. I uploaded it to Azure WebApp as a webjob, as shown below, and started it.

Finally, it works fine for me and I can see the message interval 10 sec displayed in my telegram client.