python completion triggers RequestData

In pvpython and in python shell, asking for completion trigger the RequestData of the targeted object.

To reproduce in pvpython:

Python 3.9.1 (default, Dec 13 2020, 11:55:53) 
[GCC 10.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from paraview.simple import *
>>> s = Sphere()
>>> s.(  26.482s) [paraview        ]    vtkSphereSource.cxx:69    WARN| vtkSphereSource (0x556286e79310): request data called

(I press tab to ask for members of s and I previously put a vtkWarningMacro in vtkSphereSource::RequestData)