Build process finds wrong Python when using pyenv on Mac

[gussmith23]

I'm using pyenv to configure my global Python version. Python is in my path:

> which python
/Users/gus/.pyenv/shims/python
> which python3
/Users/gus/.pyenv/shims/python3

But when I run make:

> make       
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_SHARED_LIBS=OFF  -S . -B build
-- The C compiler identification is AppleClang 17.0.0.17000013
-- The CXX compiler identification is AppleClang 17.0.0.17000013
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Building Surelog version v1.84 [da9e44be7702b9932d40e66d6dcabbca5c368199]
-- Building without demo. To enable demo build use: -DWITH_DEMO=True
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Found Python3: /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12 (found version "3.12.8") found components: Interpreter
-- Python3_EXECUTABLE = /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'orderedmultidict'
CMake Error at third_party/UHDM/CMakeLists.txt:47 (message):
  The "orderedmultidict" Python3 package is not installed.  To install use
  following command: "pip3 install orderedmultidict".

At first, I thought it was the missing library issue. Then I realized that it was picking up a different Python:

-- Found Python3: /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12 (found version "3.12.8") found components: Interpreter
-- Python3_EXECUTABLE = /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12

[gussmith23]

Note: after debugging, it seems this message is coming from UHDM.

[Thomasb81]

What return python --version ? Does /Users/gus/.pyenv/shims/python3 really exist ?

If you try to re-use a python virtual environment while the initial python binary pointed by your virtualenv is no more there you can end up to use the wrong python version. ie one where Ordermultidict is not available. While it was initially in your virtualenv at the time it was working ...