Run Python as external process

It is possible to start Python running

<GiDdirectory>/scripts/tohil/python/python

This opens the typical Python console:

• in Windows:

  

• in Linux:

  gid-user@linux:~ $ $HOME/GiDx64/gid-16.1.2d/scripts/tohil/python/python
  Python 3.10.8 (main, Oct 27 2022, 17:52:20) [GCC 5.4.0 20160609] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> print( "Hello World !!!");
  Hello World !!!
  >>> 
  

This python process is not related with the gid.exe process (it is not an embedded Python)

It can be used for example to run a GiD problemtype Python-based solver, without installing an extra Python, by using GiD’s python, and its relative location is known a priori.

If this process is killed the gid process is not affected, and they don’t share any memory.

It is possible to import the tohil module in this Python interpreter to call Tcl commands, but this will create a new Tcl interpreter with the standard Tcl commands. Thus GiD commands like tohil.call( 'GiD_Info', 'mesh', 'nodes', '-array') or tcl.GiD_Info( 'mesh', 'nodes', '-array') can not be called.

Example:

gid-user@linux:~ $ $HOME/GiDx64/gid-16.1.2d/scripts/tohil/python/python
Python 3.10.8 (main, Oct 27 2022, 17:52:20) [GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from tkinter import *
>>> from tkinter import ttk
>>> root = Tk()
>>> frm = ttk.Frame( root, padding = 10)
>>> frm.grid()
>>> ttk.Label( frm, text = "Helo World !!!").grid( column = 0, row = 0)
>>> ttk.Button( frm, text = "Quit", command = root.destroy).grid( column = 1, row = 0)
>>> root.mainloop()