pythseq / fastpath

A program to find the path through a network of nodes.

Introduction

Fastpath is a fast and lightweight tool for finding the shortest path in a weighted graph. As input it only needs the starting node, the ending node, and the weights of each node to node edge. For versatility it uses the Bellman-Ford algorithm, which allows for negative weights. Future version will incorporate the Dijkstra algorithm to speed up runtimes on graphs that do not contain negative edges. To install fastpath,

git clone [email protected]:deprekate/fastpath.git
cd fastpath; make

The only library dependency for fastpath is uthash (which is included). The fastpathz has the extra dependency of mini-gmp (which is included).

Fastpath Example

Run on included sample data:

fastpath --source a --target e < input 

Output is the path of nodes, and should look like

a
c
d
e

The structure of the graph looks like:

a ─────▶ b ◀───── f
│        │
│        │
▼        ▼
c ─────▶ d ─────▶ e

• Strings can be used for the nodes, and the weights can be positive or negative long double numbers. The weights can even be in the form of scientific shorthand (1.6E+9).