ivy is a lightweight library and an interactive visual programming environment for phylogenetics. It is built on a powerful foundation of open-source software components, including numpy, scipy, matplotlib, and IPython.

ivy emphasizes interactive, exploratory visualization of phylogenetic trees. For example, in IPython:

from ivy.interactive import *

root = readtree("primates.newick")
fig = treefig(root)

This will open an interactive tree window that allows panning, zooming, and node selection with the mouse. Additionally, you can manipulate the figure from the console, e.g.:

fig.ladderize()
fig.toggle_leaflabels()

(Out of date and incomplete)

http://www.reelab.net/ivy

Recommended for non-developers: use conda for Python 3.

1. Download and install Miniconda for Python 3

   https://conda.io/miniconda.html

   The following assumes conda is now in your $PATH.

2. Create an environment for ivy:

   conda create -n ivy ipython jupyter numpy scipy matplotlib biopython pillow pyparsing pytz pandas lxml

3. Activate the environment:

   source activate ivy

4. Install ivy:

   pip install https://github.com/rhr/ivy/zipball/master

5. To update, uninstall it first:

   pip uninstall ivy-phylo

   then re-run pip as above.