Developer information

Setting up a testing environment

For development it is recommended to set up a virtual environment inside the source folder:

$ python3 -m venv venv
$ source python3/bin/activate

The last command will active the virtual environment, and will replace the python3 and pip commands in your shell. Now make sure you have the latest pip installed:

$ pip install --upgrade pip

Now install the MonetDBe-Python project in developing mode (hence the -e):

$ CFLAGS="-I<monetdb_prefix>/include/ -L<monetdb_prefix>/lib/" pip install -e ".[test,doc]

The CFLAGS above are required to make sure pip can find MonetDB. Using developer mode, any changes to the Python code will be directly reflected without reinstallation. The only exception is code related to the low-level interface, which does require a reinstall (just run the above command again).

Running the teste suite

After setting up te testing environment, run from the source folder:

LD_LIBRARY_PATH=<monetdb_prefix>/lib pytest

Making binary wheel for Linux

  • Docker

  • make

Then run

$ make docker-wheels
$ venv/bin/pip install twine
$ venv/bin/twine upload dist/*.whl dist/*.tar.gz

Making binary wheel for OSX

  1. get a High Sierra machine (10.13)

  2. install homebrew

/bin/bash -c "$(curl -fsSL"
  1. install requirements

brew install python3 bison cmake mercurial pyenv openssl
  1. get monetdb

hg clone hg://
  1. build monetdb

cd MonetDB
mkdir build
cd build
make -j10 install
  1. install the pythons

pyenv install 3.6.10
pyenv install 3.7.7
pyenv install 3.8.2
  1. set some flags to find the monetdb libs

export CFLAGS="-I/Users/gijs/opt/include -L/Users/gijs/opt/lib"
export DYLD_LIBRARY_PATH=/Users/gijs/opt/lib
  1. make the binary wheels

~/.pyenv/versions/3.6.10/bin/python bdist_wheel
~/.pyenv/versions/3.7.7/bin/python bdist_wheel
~/.pyenv/versions/3.8.2/bin/python bdist_wheel

9 fix the binary wheels

~/.pyenv/versions/3.8.2/bin/pip install delocate
~/.pyenv/versions/3.8.2/bin/delocate-wheel -v dist/*.whl

10 upload the wheels

~/.pyenv/versions/3.8.2/bin/pip install twine
~/.pyenv/versions/3.8.2/bin/twine upload dist/*.whl

Making binary wheel for Windows

Compile MonetDB on Windows

install microsoft visual studio community edition:

install bison:

install prce:

Clone and build monetdb:

Compile monetdbe