Conda installation¶

Starting with Lenstool version 8, you can install lenstool including the new Python wrapper in a conda environment.

First, create a conda environment named lenstool. You can skip this step if you want to install Lenstool in the default `base` environment.

conda create -n lenstool
conda activate lenstool

Now you can download and untar the release-8 version of Lenstool

curl -O https://git-cral.univ-lyon1.fr/lenstool/lenstool/-/archive/8.0.4/lenstool-8.0.4.tar.gz
tar xzf lenstool-8.0.4.tar.gz
cd lenstool-8.0.4

To compile lenstool, you need to install the dependencies in your conda environment

conda install wcslib cfitsio gsl pip numpy <your compiler>

replacing <your compiler> with one of the following package name

• clang-osx-64 for Mac OSX
• gcc_linux-64 for Linux

More options can be found on the Anaconda compiler web page.

Finally, you can compile and install Lenstool

./configure --prefix=$CONDA_PREFIX --with-cfitsio-prefix=$CONDA_PREFIX --with-wcslib-include-path=$CONDA_PREFIX/include/wcslib --with-wcslib-lib-path=$CONDA_PREFIX/lib --with-gsl-prefix=$CONDA_PREFIX
make
make install

To install the Python wrapper with pip, you can run the command

python -m pip install -vv --no-deps --ignore-installed .

Now, you should be able to go to any directory and import the Lenstool module

>>> import lenstool

Remember to activate the lenstool conda environment every time you open a new Terminal, and want to use Lenstool.