BUG about core_display_pbr.py

[zhsunsea]

When run this program, a bug appears:

File "C:/workspaces/python/pythonocc-demos/examples/core_display_pbr.py", line 81, in <module>
    display.DisplayShape(bottle, material=alu_pbr_aspect)

  File "C:\ProgramData\Anaconda3\envs\OCCT751\lib\site-packages\OCC\Core\Graphic3d.py", line 14867, in __init__
    _Graphic3d.Graphic3d_MaterialAspect_swiginit(self, _Graphic3d.new_Graphic3d_MaterialAspect(*args))
TypeError: Wrong number or type of arguments for overloaded function 'new_Graphic3d_MaterialAspect'.
  Possible C/C++ prototypes are:
    Graphic3d_MaterialAspect::Graphic3d_MaterialAspect()
    Graphic3d_MaterialAspect::Graphic3d_MaterialAspect(Graphic3d_NameOfMaterial const)

Hope u can give the answer.
Env:

• pythonocc-core 7.5.1
• OS: win10