So far, the installation is still unsuccessful using python

[liaoran]

Python version: 3.8.11
Swig version: 3.0.12
OS: Ubuntu 20.04.3 LTS
Error information:

swigging cpp/src/external/eigen/.hg/store/data/_c_test_config.cmake.i to cpp/src/external/eigen/.hg/store/data/_c_test_config.cmake_wrap.cpp
swig -python -c++ -o cpp/src/external/eigen/.hg/store/data/_c_test_config.cmake_wrap.cpp cpp/src/external/eigen/.hg/store/data/_c_test_config.cmake.i
cpp/src/external/eigen/.hg/store/data/_c_test_config.cmake.i:3: Error: Unterminated string constant
error: command 'swig' failed with exit status 1

[dblalock]

Thanks for filing this! Consolidating everything into #4, but feel free to reopen if you think your issue is different.