This section contains information for users who want to extend the tox source code.
To generate the project interpreter you can use
tox -rvvve dev.
For tests we use pytest, therefore change the Default test runner to
In order to be able to debug tests which create a virtual environment (the ones in
test_z_cmdline.py) one needs to disable the PyCharm feature Attach to subprocess automatically while debugging (because virtualenv creation calls via subprocess to the
pipexecutable, and PyCharm rewrites all calls to Python interpreters to attach to its debugger - however, this rewrite for pip makes it to have bad arguments:
no such option --port).
Multiple Python versions on Windows¶
In order to run the unit tests locally all Python versions enlisted in
tox.ini need to be installed.
For a nice Windows terminal take a look at cmder.
One solution for this is to install the latest conda, and then install all Python versions via conda envs. This will create separate folders for each Python version.
conda create -n python2.7 python=2.7 anaconda
For tox to find them you’ll need to:
add the main installation version to the systems
D:\Anaconda- you can use WindowsPathEditor)
for other versions create a BAT scripts into the main installation folder to delegate the call to the correct Python interpreter:
@echo off REM python2.7.bat @D:\Anaconda\pkgs\python-2.7.13-1\python.exe %*
This way you can also directly call from cli the matching Python version if you need to(similarly to UNIX systems), for example:
python2.7 main.py python3.6 main.py