Passing argument from user defined m code to python script

I'm sure this has been covered but I can't get it to work.
I am trying to pass a variable from M101 Pxxxx to a python script.
In the python file I am just writing the variable to a file for testing.
I put a pin state change in the M101 just to visually see that it is working with HAL meter.
Here are my 2 files. The M code file works fine and the python file work fine it just wont pass the parameter.

M101
#!/bin/bash
python /home/kent/linuxcnc/m_codes/current_command.py $1
halcmd setp parport.0.pin-17-out True
exit 0

current_command.py
requested_current = $1
set_current = requested_current
f = open("/home/kent/linuxcnc/write_test.txt", "a")
f.write(set_current)
f.close()

Thanks in advance

I think the problem is in your python script, and how you are trying to pass the argument to it.
www.tutorialspoint.com/python/python_command_line_arguments.htm

Your M101 can be a Python script, no need to go via bash.

Then (as has been said) you get the P and Q with sys.argv.

One reason to use a bash script calling a oython script is if you want the pythin to run in the background, as explained here:
forum.linuxcnc.org/10-advanced-configura...cript?start=10#57807


If you need to pass more than 2 parameters then you can use a Python remap instead. (ie remap an unallocated M or G-code outside the M101 to M199 range, bt that is a little more work)

Did you ever get this to work?

Bill

Yes, I just tried it.

Save this file in the same folder as the INI of your config as "M110"

Make the file executable

check that is works at the command line first:

If that works, then start LinuxCNC and in the MDI window run:

And you should see the P and Q numbers.