This module let users visualize recursive calls. Inputs and outputs are properly shown in the call graph.

It is a based on carlsborg's rcviz module.

It should work with Jupyter notebooks.

Python's graphviz module needs to be installed first.

from rcviz import viz
@viz()
def count_items(L):
    if len(L)==0:
        return 0
    L.pop(0)
    return 1 + count_items(L)

count_items(['a','b','c'])
viz.render()

In a Jupyter notebook, the call graph is shown in line.

In a Python program, the picture is saved to callgraph.png.