parameters: (key)
docstring: Key is the key of scene object host to particle system
docstring_summary: Key is the key of scene object host to particle system
docstring_tokens: Key is the key of scene object host to particle system
function: def PtGetNumParticles(key):
      """Key is the key of scene object host to particle system"""
      pass
function_tokens: def PtGetNumParticles ( key ) : pass