- simple_cycles(graph, /)#
Find all simple cycles of a
A “simple cycle” (called an elementary circuit in ) is a cycle (or closed path) where no node appears more than once.
This function is a an implementation of Johnson’s algorithm  also based on the non-recursive implementation found in NetworkX. 
 https://doi.org/10.1137/0204007  https://networkx.org/documentation/stable/reference/algorithms/generated/networkx.algorithms.cycles.simple_cycles.html  https://github.com/networkx/networkx/blob/networkx-2.8.4/networkx/algorithms/cycles.py#L98-L222