graphterm provides basic support for interactive drawings of directed acyclic graphs in ASCII.

Create a TermDAG object and populate it with nodes and links. Call interactve() to draw in interactive form and printonly() to output the ASCII representation to stdout:

import graphterm as gt

dag = TermDAG()
dag.add_node('alpha')
dag.add_node('beta')
dag.add_node('gamma')
dag.add_node('delta')
dag.add_node('epsilon')
dag.add_node('zeta')

dag.add_link('alpha', 'beta')
dag.add_link('alpha', 'gamma')
dag.add_link('alpha', 'delta')
dag.add_link('beta', 'epsilon')
dag.add_link('gamma', 'epsilon')
dag.add_link('delta', 'epsilon')
dag.add_link('delta', 'zeta')

dag.printonly()

The resulting graph is shown below. As there is not enough room for the label for gamma, it is collected in a list on the right.

        o alpha                    
        |                          
       /|\                         
      | | |                        
 beta o o o delta [ gamma ]        
      | | |                        
       \|/|                        
        | |                        
epsilon o o zeta      

In interactive mode, nodes can be highlighted by typing a / followed by their name, for example /gamma would highlight the name and node for gamma as well as its connected neighbors. The highlighting can walk through the nodes from left to right, top to bottom with n and p.

For larger graphs, scrolling is accomplished with the arrow keys or w, a, s, d.

To quit the interactive mode, use q.

graphterm was written by Kate Isaacs.

graphterm is released under the LGPL v3 license. For more details, see the LICENSE file.