Metadata-Version: 2.1
Name: graph-theory
Version: 2020.2.6.35531
Summary: A graph library
Home-page: https://github.com/root-11/graph-theory
Author: Bjorn Madsen
Author-email: bjorn.madsen@operationsresearchgroup.com
License: MIT
Description: # graph-theory
        [![Build Status](https://travis-ci.org/root-11/graph-theory.svg?branch=master)](https://travis-ci.org/root-11/graph-theory)
        [![Code coverage](https://codecov.io/gh/root-11/graph-theory/branch/master/graph/badge.svg)](https://codecov.io/gh/root-11/graph-theory)
        
        A simple graph library...<br>
        *... A bit like networkx, just without the overhead...*<br> 
        *... similar to graph-tool, without the Python 2.7 legacy...*<br>
        *... with code that you can explain to your boss..."*<br>
        
        ---------------------------
        Install:
        
            pip install graph-theory
        
        ---------------------------
        Import:
        
            import Graph
            g = Graph()
        
        ---------------------------
        
        Modules:
        
        | module | description |
        |:---|:---|
        | `from graph import Graph, Graph3D` | Elementary methods (see basic methods below) for Graph and Graph3D.|
        | `from graph.assignment_problem import ...` | solvers for assignment problem, the Weapons-Target Assignment Problem, ... |
        | `from graph.flow_problem import ...` | maximum flow |
        | `from graph.hash import ...` | graph hash functions: graph hash, merkle tree, flow graph hash | 
        | `from graph.random import ...` | graph generators for random, 2D and 3D graphs. |
        | `from graph.scheduling import sp_solver` | Scheduling problem solver. |
        | `from graph.search import ...` | shortest path, breadth-first, depth-first |
        | `from graph.topology import ...` | Topological comparisons and operators: make/assert subgraph, detect partitions, path comparisons, cycle detection, path verification, network range |
        | `from graph.transform import ...` | Isomorphic transformation methods like adjacency matrix, all-pairs-shortest path, etc. | 
        
        
        All module functions are available from Graph, Graph2D and Graph3D (where applicable).
        
        | methods | description |
        |:---|:---|
        | `a in g` | assert if g contains node a |
        | `g.add_node(n, [obj])` | adds a node (with a pointer to object `obj` if given) |
        | `g.node(node1)` | returns object attached to node 1. |
        | `g.del_node(node1)` | deletes node1 and all it's edges. |
        | `g.nodes()` | returns a list of nodes |
        | `len(g.nodes())` | returns the number of nodes |
        | `g.nodes(from_node=1)` | returns nodes with edges from node 1 |
        | `g.nodes(to_node=2)` | returns nodes with edges to node 2 |
        | `g.nodes(in_degree=2)` | returns nodes with 2 incoming edges |
        | `g.nodes(out_degree=2)` | returns nodes with 2 outgoing edges |
        | `g.add_edge(1,2,3)` | adds edge to g for vector `(1,2)` with value `3` |
        | `g.edge(1,2)` | returns value of edge between nodes 1 and 2 |
        | `g.edge(1,2,default=3)` | returns `default=3` if `edge(1,2)` doesn't exist. <br>similar to `d.get(key, 3)`|
        | `g.del_edge(1,2)` | removes edge between nodes 1 and 2 |
        | `g.edges(path=[path])` | returns a list of edges (along a path if given). |
        | `g.edges(from_node=1)` | returns edges outgoing from node 1 |
        | `g.edges(to_node=2)` | returns edges incoming to node 2 |
        | `len(g.edges())` | returns the number of edges |
        | `g.from_dict(d)` | updates the graph from a dictionary |
        | `g.to_dict()` | dumps the graph as a dictionary |
        | `g.from_list(L)` | updates the graph from a list |
        | `g.to_list()` | dumps the graph as a list of edges |
        | `g.shortest_path(start,end)` | finds the path with smallest edge sum |
        | `g.breadth_first_search(start,end)` | finds the with least number of hops |
        | `g.depth_first_search(start,end)` | finds a path between 2 nodes (start, end) using DFS and backtracking. |
        | `g.distance_from_path(path)` | finds the distance following a given path. |
        | `g.maximum_flow(source,sink)` | finds the maximum flow between a source and a sink|
        | `g.solve_tsp()` | solves the traveling salesman problem for the graph|
        | `g.is_subgraph(g2)` | determines if graph `g2` is a subgraph in g.|
        | `g.is_partite(n)` | determines if graph is n-partite |
        | `g.has_cycles()` | determines if there are cycles in the graph |
        | `g.same_path(p1,p2)` | compares two paths, returns True if they're the same.|
        | `g.adjacency_matrix()` | returns the adjacency matrix for the graph.|
        | `g.all_pairs_shortest_paths()` | finds the shortest path between all nodes. |
        | `g.shortest_tree_all_pairs()` | finds the shortest tree for all pairs.|
        | `g.has_path(p)` | asserts whether a path `p` exists in g.|
        | `g.all_paths(start,end)` | finds all combinations of paths between 2 nodes.|
        
        ## FAQ
        
        | want to | doesn't work | do instead | but why? |
        |:---|:---|:---|:---|
        | have multiple edges between two nodes | `Graph(from_list=[(1,2,3), (1,2,4)]` | Add dummy nodes<br>`[(1,a,3), (a,2,0),`<br>` (1,b,4),(b,2,0)]` | Explicit is better than implicit. |
        | multiple values on an edge | `g.add_edge(1,2,{'a':3, 'b':4})` | Have two graphs<br>`g_a.add_edge(1,2,3)`<br>`g_b.add_edge(1,2,4)` | Most graph algorithms don't work with multiple values |   
        
        ## Specialised modules:
        
            from graph import Graph
            from graph import Graph3D
            from graph.hashing import merkle_tree
            from graph.assignment_problem import ap_solver
            from graph.assignment_problem import wtap_solver
            from graph.scheduling_problem import sp_solver
        
        
        Examples contains a number of tutorial/solutions to common operations research
        and computer science problems, which are made simple when treated as a graph.
        
        | module | function | description |
        |:---|:---|:---|
        | assignment_problem.py | assignment_problem |  solves the assignment problem |
        | hashgraph.py | merkle_tree | datablocks |
        | hashgraph.py | graph_hash | computes the sha256 of a graphs nodes and edges |
        | hashgraph.py | flow_graph_hash | computes the sha256 of a graph with multiple sources and sinks |
        | knapsack_problem.py | knapsack problem | solves the knapsack problem |
        | wtap.py | weapons-target assignment problem | solves the WTAP problem. | 
        
        
Keywords: adjacency,all pairs shortest path,assignment problem,complex-networks,component,components,cycle,discrete mathematics,flow-problem,graph,Graph Theory,graph-algorithms,graph-analysis,graph-generation,graph-hash,graph-theory,graph-visualization,graphs,hash,math,Mathematics,maths,matrix,minimum-spanning-trees,network,Networks,optimization,path,python,random graph,search,shortest-path,tsp,tsp-solver
Platform: any
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Science/Research
Classifier: Natural Language :: English
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Description-Content-Type: text/markdown
