implemented the change in state_point.cpp and test_state_point.py

[xinzhouhe]

Description

Please include a summary of the change and which issue is fixed if applicable. Please also include relevant motivation and context.

Fixes # 2393 (issue)

Checklist

• [x] I have performed a self-review of my own code
• [x] I have run clang-format (version 15) on any C++ source files (if applicable)
• [x] I have followed the style guidelines for Python source files (if applicable)
• [x] I have made corresponding changes to the documentation (if applicable)
• [x] I have added tests that prove my fix is effective or that my feature works (if applicable)