How to add nodes in networkx Python

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by vsasikalabe dot icon Updated: Oct 4, 2023

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The add_node() function adds a single node. Also, the add_nodes() function adds multiple nodes to the graph. We can also set the optional color parameter for both functions. 

This is to set the color of the node(s). We can load and store networks in standard and nonstandard data format sets. We can also generate many types of random and classic networks. Researchers use this to analyze network structure and build network models. NetworkX has several functions like in other libraries. We must create an empty graph with no nodes and no edges. We import networkx as nx.   

The NetworkX reference document has details on various other network algorithms. You can solve it using the NetworkX package. NetworkX is a powerful Python library. It allows data scientists to manipulate, analyze, and visualize complex networks. These properties give a real-time view of the different properties of the graphs. 

Also, provide more methods on those attributes in different ways. NetworkX allows you to create directed graphs using class. It provides additional methods and properties specific to directed edges. When adding weighted edges, you enter triples of the two edge endpoints.   

We can also examine the existing nodes on a graph with the property. It returns an iterable object. The difference between the rustworkx and methods will create new nodes. If the network is small to visualize and the node labels are tiny enough to fit in a circle. Then, we can use the argument. 

NetworkX's doesn't have an option for edge labels. Adding labels is only exposed through a separate function. It would help if you used the dictionary from the original visualization. Networkx has a graph, node, edge attributes, and the hashable object used for a node's payload. NetworkX provides classes for graphs. It allows many edges between any pair of nodes.   

By default, these are empty. You can modify attributes with add_edge and add_node. Directly change attribute dictionaries (G.graph, G.node, and G.edge). Each graph, node, and edge has key/value attribute pairs. It is associated with an attribute dictionary. In NetworkX, nodes can be the hashable object (text string, an image, an XML object).   

Preview of the output that you will get on running this code from your IDE.


In this solution, we used the Networkx library.


Follow the steps carefully to get the output easily.

  1. Download and Install the PyCharm Community Edition on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Install Networkx - pip install networkx.
  4. Create a new Python file on your IDE.
  5. Copy the snippet using the 'copy' button and paste it into your python file.
  6. Write import networkx as nx in line no 1.
  7. Delete all arrows.
  8. Add print in line no.4 and 8.
  9. Run the current file to generate the output.

I hope you found this useful. I have added the link to dependent libraries, and version information in the following sections.

I found this code snippet by searching for ' Adding a node with attribute in a NetworkX graph' in Kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in PyCharm 2022.3.
  2. The solution is tested on Python 3.11.1
  3. Networkx version- 3.1

Using this solution, we are able to add nodes in Networkx Python with simple steps. This process also facilitates an easy-way-to use, hassle-free method to create a hands-on working version of code which would help us to add nodes in Networkx python

Dependent Libraries

networkxby networkx

Python doticonstar image 12745 doticonVersion:networkx-3.1doticon
License: Others (Non-SPDX)

Network Analysis in Python


            networkxby networkx

            Python doticon star image 12745 doticonVersion:networkx-3.1doticon License: Others (Non-SPDX)

            Network Analysis in Python

                      If you do not have the Networkx library that is required to run this code, you can install it by clicking on the above link.

                      You can search for any dependent library on Kandi like Networkx.


                      1. How can I use NetworkX to analyze the structure of a network?   

                      • Users manipulate, analyze, and model graph data using this Python library.   
                      • We initialize an empty graph using nx.Graph(), in which we can add nodes and edges.   
                      • Using the add_nodes_from method, we entered the integers [1, 2, 3] as nodes.   
                      • We can use the nodes method to see the nodes present in the graph.   
                      • Similarly, use .add_edges and edges to add and see the edges in the graph.  
                      • A tuple represents the edges between nodes. Each tuple shows the nodes present on that edge.   


                      2. What are the different types of NetworkX graphs, and which should I use?   

                      Networkx Class Type Self-loops allowed   

                      Graph undirected Yes   

                      DiGraph directed Yes   

                      MultiGraph undirected Yes   

                      MultiDiGraph directed Yes   


                      3. Are there any new algorithms for analyzing networks using NetworkX?   

                      Exploring Graph Algorithms with NetworkX in Python  

                      • Add nodes G. add_node(1) G.   
                      • Perform breadth-first search bfs_tree = nx.  
                      • Perform depth-first search dfs_tree = nx.   
                      • Find the shortest path using Dijkstra's algorithm shortest_path = nx.   


                      4. How do I create graph objects in NetworkX?   

                      In NetworkX, the nodes can be any hashable object. You cannot use Python's None object as a node. Many functions declare whether they have assigned optional function arguments.   


                      5. How can network analysis use node attributes, and what are their purposes?   

                      The node's attributes are measurable characteristics. The relationship that connects them involves using the node's attributes in the network. It shall be the updated weighted adjacency matrix. 


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