Buildbot installation requires msvc14 - buildbot

Question

I've been trying the BuildBot First Run tutorial. It starts by creating a master and looks quite simple and straightforward, but I've encountered problems with the step pip install 'buildbot[bundle]'.
I get this error message (this is the end of the log):
building 'twisted.test.raiser' extension
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/
----------------------------------------
Command "c:\users\remi\appdata\local\programs\python\python37-32\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Remi\\AppData\\Local\\Temp\\pip-install-10x0qptg\\Twisted\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\Remi\AppData\Local\Temp\pip-record-c63k2sci\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\Remi\AppData\Local\Temp\pip-install-10x0qptg\Twisted\
I've tried installing mscv build tools, but still get the same message.
Any ideas how I could fix the problem?

Answer 1

Problem is twisted does not yet support python 3.7 (see related issue here: Installing Twisted for Python using pip: error: Microsoft Visual Studio failed with exit status 2).
You can work around this problem by installing precompiled twisted binaries. For example from here: https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted
E.g. in your case download Twisted‑18.9.0‑cp37‑cp37m‑win32.whl and do
pip install Twisted‑18.9.0‑cp37‑cp37m‑win32.whl
Then retry the buildbot install.
pip install 'buildbot[bundle]'