Hi, I am trying to use the technique of pillow to pre-emptively build windows 38 wheel for x_64 and also i686. I used https://github.com/matthew-brett/multibuild/blob/devel/install_python.ps1 as a starting point, but made the version stuff explicit so my install ps1 looks like

# Install specified Python version. # Install only if: # Our current matrix entry uses this Python version AND # Python version is not already available. Write-Host "install_python.ps1 PYTHON=Python${env:PYVER}" -ForegroundColor Yellow

$PYTHON="C:\Python${env:PYVER}" $py_exe = "${PYTHON}\Python.exe" Write-Host "py_exe: ${py_exe}" -ForegroundColor Yellow

if ( [System.IO.File]::Exists($py_exe) ) { Write-Host "${py_exe} apparently exists" -ForegroundColor Red exit 0 } if ($PYTHON -eq "C:\Python38-x64") { $exe_suffix="-amd64" $req_ver="3.8.0" $req_dir="3.8.0" } elseif ($PYTHON -eq "C:\Python38") { $exe_suffix="" $req_ver="3.8.0" $req_dir="3.8.0" } else { Write-Host "python undiscovered" -ForegroundColor Red exit 0 }

$py_url = "https://www.python.org/ftp/python" Write-Host "Installing Python ${req_ver}$exe_suffix..." -ForegroundColor Yellow $exePath = "$env:TEMP\python-${req_ver}${exe_suffix}.exe" $downloadFile = "$py_url/${req_dir}/python-${req_ver}${exe_suffix}.exe"

Write-Host "exePath=${exePath} downloadFile=${downloadFile}"

Write-Host "Downloading $downloadFile..." (New-Object Net.WebClient).DownloadFile($downloadFile, $exePath) Write-Host "Installing..." cmd /c start /wait $exePath /quiet TargetDir="$PYTHON" Shortcuts=0 Include_launcher=0 InstallLauncherAllUsers=0 Write-Host "Python ${req_ver} installed to $PYTHON"

echo "$(& $py_exe --version 2> $null)"

the appveyor log reoports this as working so there I see this reported

install_python.ps1 PYTHON=Python38-x64 py_exe: C:\Python38-x64\Python.exe Installing Python 3.8.0-amd64... exePath=C:\Users\appveyor\AppData\Local\Temp\1\python-3.8.0-amd64.exe downloadFile=https://www.python.org/ftp/python/3.8.0/python-3.8.0-amd64.exe Downloading https://www.python.org/ftp/python/3.8.0/python-3.8.0-amd64.exe... Installing... Python 3.8.0 installed to C:\Python38-x64 Python 3.8.0

I then used this python to build a reportlab wheel; that was reported as C:\projects\reportlab\dist\reportlab-3.5.32-cp38-cp38m-win_amd64.whl I loaded this wheel onto a windows 10 machine which reports itself as 64-bit OS x64-based processor I installed Python 3.8 and used it to create a virtualenv; the venv python reports itself as Python 3.8.0 (64-bit), but when run it says Python 3.8.0 ........ [MSC v.1916 64 bit (AMD64)] on win32 The real problem is that the virtualenv pip wuill not install my wheel the error says ERROR: reportlab-3.5.32-cp38-cp38m-win_amd64.whl is not a supported wheel on this platform. I have already built reportlab-3.5.32-cp37-cp37m-win_amd64.whl as part of the standard appveyor process and that installs fine into a virtualenv built for Python 3.7.5. I am slightly mystified can anyone suggest what I am doing wrong? -- Robin Becker