Python Script Launcher

PSL : A simple python script launcher with global params overridance.

Concept

• It happens you need to run some scripts in a row
• It happens as well you need to run a script with different params contexts
• PSL allows to launch scripts and externally override global params
• In a script, lib.PSLUpdateGlobalsFromEncodedCallArgs() hooks PSL in (previously defined global params can be potentially overriden)
• From a launcher script, lib.PSLLaunch(scriptFile, scriptArgs, globalParams) will launch the script scriptFile, with args scriptArgs, and will override global params with globalParams
• globalParams is a dictionnary of global params :
  • The keys are the name of a script global params
  • If the global param is not defined in the script, no failure
  • If the the global param is defined in the script :
    • If it is a dictionnary, the dics are merged
    • If not, the value is overriden
• The globalParams are actually sent to the script as a base64 encoded string as the named arg --updateGlobals
• In PSLed script, the global params are updated with inspect.currentframe()

Demo implementation

• scriptLauncher.py is the launcher script
• scriptX.py are test launched scripts
• params.json is defining groups of runs
• A run is a python script + its global params overridances
• Tests:
  • Manual / traditionnal launching : python script1.py
  • PSL lauching on all groups : python scriptLauncher.py all
  • PSL lauching on a specific group : python scriptLauncher.py smalls

Installation

• python 3
• pip install -r requirements.txt