How to connect to the Ethereum network using Python

Auston Bunsen
August 16, 2020


You can build Ethereum applications in different programming languages. In this article, we will connect to the Ethereum network using Python.


  • Ethereum Node (We will use QuikNode’s free version)
  • Python installed in your system (version >=3.5.3) and Pip3
  • Install (A Python wrapper for Ethereum node APIs)
  • A text editor

We need Python version >=3.5.3 and install using pip3 install web3.

Python and other library versions are the cause of the common installation problems. Therefore, if you face any problem, try setting up a virtual environment and troubleshoot installation.

Connecting to Ethereum Blockchain

A network of Ethereum nodes is called Ethereum blockchain. To interact with Etherum blockchain, these nodes expose APIs which are available using library.

In addition, we will need a running Ethereum node, therefore, we will use QuikNode’s free version. Just sign up here and get the node URL.

Once Sign up, open your Node page and copy Ethereum Node URL

We will use to get the latest Ethereum block number. For this, we will use the code snippet given below. 

from web3 import Web3, HTTPProvider
w3 = Web3(HTTPProvider('YOUR_ETHEREUM_NODE_URL'))print ("Latest Ethereum block number" , w3.eth.blockNumber)

In this snippet, we are importing library and adding our Ethereum node URL and getting the latest Ethereum block number using w3.eth.blockNumber API.

Now, we will save this code snippet in file and then run it using python command. After running this command we will see the latest Ethereum block number as shown below.

That’s it you have connected through Ethereum network using Python. In addition, you can learn more APIs to build complex applications on Ethereum.
Auston Bunsen
Auston is a software engineer and the cofounder of QuikNode. He's passionate about the power of Web3 and curious to see what people build on top of QuikNode.

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