TypeError in windows / msvc.py when VCRuntimeRedist is not present

[zzzeek]

User is reporting the below stack trace on windows. This would indicate that the method VCRuntimeRedist at https://github.com/pypa/setuptools/blob/master/setuptools/msvc.py#L1540 is returning None and the method at https://github.com/pypa/setuptools/blob/master/setuptools/msvc.py#L1574 is nonetheless assuming a non-None result.

It's very hard to find this error elsewhere but I did see it reported (and mis-diagnosed) here: https://stackoverflow.com/questions/58677600/unable-to-install-jupyterlab-for-python3-8-64bit

 Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 217, in <module>
        run_setup(True)
      File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 196, in run_setup
        **kwargs
      File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\__init__.py", line 145, in setup
        return distutils.core.setup(**attrs)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\core.py", line 148, in setup
        dist.run_commands()
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 966, in run_commands
        self.run_command(cmd)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
        cmd_obj.run()
      File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\command\install.py", line 61, in run
        return orig.install.run(self)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\install.py", line 545, in run
        self.run_command('build')
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\cmd.py", line 313, in run_command
        self.distribution.run_command(command)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
        cmd_obj.run()
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build.py", line 135, in run
        self.run_command(cmd_name)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\cmd.py", line 313, in run_command
        self.distribution.run_command(command)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
        cmd_obj.run()
      File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 54, in run
        build_ext.run(self)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 339, in run
        self.build_extensions()
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 448, in build_extensions
        self._build_extensions_serial()
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 473, in _build_extensions_serial
        self.build_extension(ext)
      File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 60, in build_extension
        build_ext.build_extension(self, ext)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 533, in build_extension
        depends=ext.depends)
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\_msvccompiler.py", line 345, in compile
        self.initialize()
      File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\_msvccompiler.py", line 238, in initialize
        vc_env = _get_vc_env(plat_spec)
      File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\msvc.py", line 171, in msvc14_get_vc_env
        return EnvironmentInfo(plat_spec, vc_min_ver=14.0).return_env()
      File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\msvc.py", line 1620, in return_env
        if self.vs_ver >= 14 and isfile(self.VCRuntimeRedist):
      File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\genericpath.py", line 30, in isfile
        st = os.stat(path)
    TypeError: stat: path should be string, bytes, os.PathLike or integer, not NoneType
    ----------------------------------------

[zzzeek]

multiple reports now.

[vxgmichel]

I ran into this issue too, and fixed it temporarily using:

diff --git a/setuptools/msvc.py b/setuptools/msvc.py
index 2ffe1c81..ffd01704 100644
--- a/setuptools/msvc.py
+++ b/setuptools/msvc.py
@@ -1617,7 +1617,7 @@ class EnvironmentInfo:
                                     self.FSharp],
                                    exists),
         )
-        if self.vs_ver >= 14 and isfile(self.VCRuntimeRedist):
+        if self.vs_ver >= 14 and self.VCRuntimeRedist and isfile(self.VCRuntimeRedist):
             env['py_vcruntime_redist'] = self.VCRuntimeRedist
         return env

The package (pendulum in my case) was successfully installed after this change.

[WilliamHPNielsen]

I ran into the same issue today (platform: Windows 10) and traced it down to the fact that my Visual Studio installation had no Redist folders. Cf. how setuptools finds the redistributable dll:

setuptools/setuptools/msvc.py

Line 1540 in 1d03fdc

def VCRuntimeRedist(self):

I ended up re-installing Visual Studio with all C++ development enabled. After that, the package in question (wrapt in my case) could successfully be installed.

[davinci26]

Hey folks, I run into this error and trying to debug it because it only appears on the CI but I cant repro on my local dev box.

Is this the function that I should be looking at to figure out the way it tries to resolve the path?

setuptools/setuptools/msvc.py

Line 1691 in d368be2

def VCRuntimeRedist(self):