Write-Python-Plugin.md

@@ -77,8 +77,44 @@ import anywave as aw
 aw.init(sys.argv)
 args = aw.get_props()
 ```
-
 args is a dict containing all the properties related to AnyWave current data file and the plugin context.
+When using the Plugin Creation Assistant of AnyWave, the file is automatically created.  
+## Command Line 
+You may want your plugin to be used when AnyWave is launched using the command line.   
+AnyWave can run processes/plugins when launched that way:    
+````bash
+anywave --run MyPlugin --input_file <filepath> --plugin_option1 option --plugin_option2 option ...
+````
+### Add a flag to desc.txt
+Add or edit the following line in desc.txt:
+````test
+flags = CanRunFromCommandLine
+````
+Note that you can set several flags separating them by '**:**'   
+
+### Handle command line options
+By default the plugin will have all parameters passed to anywave in the resulting args variable after the call to:
+````python
+import anywave as aw
+import sys
+aw.init(sys.argv)
+
+args = aw.get_props();
+print(args["plugin_option1"])   # value for plugin_option1 from the command line.   
+print(args["plugin_option2"])   # value for plugin_option2 from the command line.
+````
+
+However, this is possible only if we inform AnyWave about _plugin_option1_ and  _plugin_option2_.   
+Otherwise, an error will occur when using the command line saying that _plugin_option1_ and _plugin_option2_ are unknown options.    
+
+#### Register specific options
+To add support for specific command line option, add a file called **args.json** in the plugin folder.   
+This is a JSON file that must be like this:    
+````json
+{
+     "Parameters" : ["plugin_option1", "plugin_option2"]
+}
+````
 
 ## [DEBUG Python plugin](/anywave/documentation/-/wikis/Python_debug)