The **ltfatpy** package is a partial Python port of the `Large Time/Frequency Analysis Toolbox (LTFAT) <http://ltfat.sourceforge.net/>`_, a MATLAB®/Octave toolbox for working with time-frequency analysis and synthesis. It is intended both as an educational and a computational tool. The package provides a large number of linear transforms including Gabor transforms along with routines for constructing windows (filter prototypes) and routines for manipulating coefficients. The orginal LTFAT Toolbox for MATLAB®/Octave is developed at `CAHR <http://www.dtu.dk/centre/cahr/English.aspx>`_, Technical University of Denmark, `ARI <http://www.kfs.oeaw.ac.at>`_, Austrian Academy of Sciences and `I2M <http://www.i2m.univ-amu.fr>`_, Aix-Marseille Université. The Python port is developed at `LabEx Archimède <http://labex-archimede.univ-amu.fr/>`_, as a `LIF <http://www.lif.univ-mrs.fr/>`_ and `I2M <https://www.i2m.univ-amu.fr/>`_ project, Aix-Marseille Université. This package, as well as the original LTFAT toolbox, is Free software, released under the GNU General Public License (GPLv3). The latest version of **ltfatpy** can be downloaded from the following `PyPI page <https://pypi.python.org/pypi/ltfatpy>`_. The documentation is available as a `pythonhosted site <http://pythonhosted.org/ltfatpy/>`_. The development is done in this `gitlab project <https://gitlab.lif.univ-mrs.fr/dev/ltfatpy>`_, which provides the git repository managing the source code and where issues can be reported.