RustPython$ RUSTPYTHONPATH=`pwd`/Libs ./whats_left.sh

...

  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 570, in <module>
    if not sys.flags.no_site:
  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 556, in main
    ENABLE_USER_SITE = check_enableusersite()
  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 312, in addusersitepackages
    user_site = getusersitepackages()
  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 297, in getusersitepackages
    userbase = getuserbase() # this will also set USER_BASE
  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 286, in getuserbase
    USER_BASE = _getuserbase()
  File "/Users/vazrupe/workspace/RustPython/Lib/site.py", line 257, in _getuserbase
    if sys.platform == "darwin" and sys._framework:
AttributeError: module 'sys' has no attribute '_framework'

RustPython$ cargo run -- -c 'import sys; print(sys._framework)'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'sys' has no attribute '_framework'
RustPython$ python3 --version
Python 3.7.4
RustPython$ python3 -c 'import sys; print(sys._framework)'
Python

$ git clone https://github.com/python/cpython
$ cd cpython
cpython$ ./configure --with-framework-name=example --enable-framework
cpython$ make frameworkinstall
cpython$ ls /Library/Frameworks/example.framework/Versions/Current/bin/
2to3			pip3			python3-config
2to3-3.9		pip3.9			python3.9
easy_install-3.9	pydoc3			python3.9-config
idle3			pydoc3.9
idle3.9			python3
cpython$ /Library/Frameworks/example.framework/Versions/Current/bin/python3
Python 3.9.0a0 (heads/master:29bb227a0c, Sep  5 2019, 23:11:17)
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys._framework
'example'