What is a MultiGraph in NetworkX?

MultiGraph (data=None, **attr)[source] An undirected graph class that can store multiedges. Multiedges are multiple edges between two nodes. Each edge can hold optional data or attributes. A MultiGraph holds undirected edges.

Is a MultiGraph a graph?

In mathematics, and more specifically in graph theory, a multigraph is a graph which is permitted to have multiple edges (also called parallel edges), that is, edges that have the same end nodes. Thus two vertices may be connected by more than one edge.

What is the difference between simple graph and MultiGraph?

A graph is defined to be a simple graph if there is at most one edge connecting any pair of vertices and an edge does not loop to connect a vertex to itself. When multiple edges are allowed between any pair of vertices, the graph is called a multigraph.

How can you tell if a graph is directed by NetworkX?

To check if the graph is directed you can use nx. is_directed(G) , you can find the documentation here. ‘weight’ in G[1][2] # Returns true if an attribute called weight exists in the edge connecting nodes 1 and 2.

Is multigraph a pseudograph?

A multigraph is a pseudograph with no loops.

Does multigraph have self loops?

A MultiGraph holds undirected edges. Self loops are allowed. Nodes can be arbitrary (hashable) Python objects with optional key/value attributes.

What is a multigraph in data structure?

(data structure) Definition: A graph whose edges are unordered pairs of vertices, and the same pair of vertices can be connected by multiple edges. Formal Definition: Same as graph, but E is a bag of edges, not a set.

What is a multigraph used for?

A multigraph, also called multiple or multivariate network, consists of a set of actors, and a collec- tion of relations that specify how pairs of actors are related to each other (Wasserman and Faust 1994, Pattison and Wasserman 1999).

What is multigraph in data structure?

Multi Graph: Any graph which contain some parallel edges but doesn’t contain any self-loop is called multi graph. For example A Road Map. Parallel Edges: If two vertices are connected with more than one edge then such edges are called parallel edges that is many routes but one destination.

What is a DiGraph NetworkX?

A DiGraph stores nodes and edges with optional data, or attributes. DiGraphs hold directed edges. Self loops are allowed but multiple (parallel) edges are not. Nodes can be arbitrary (hashable) Python objects with optional key/value attributes.

Does NetworkX have edge?

Returns True if the graph has an edge between nodes u and v. This is the same as v in G[u] or key in G[u][v] without KeyError exceptions. Nodes can be, for example, strings or numbers.

Is multigraph directed?

A directed multigraph is a non-simple directed graph in which no loops are permitted, but multiple (parallel) edges between any two vertices are.