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how to create blockchain in python

You can use Python libraries and follow these steps to create a blockchain: establish a blockchain instance, generate a transaction, add it to the blockchain, execute mining to verify transactions, and review the blockchain's history.

Oct 20, 2024 at 03:47 pm

How to Create a Blockchain in Python

A blockchain is a distributed ledger that is used to record transactions across many computers so that any involved record cannot be altered retroactively, without the alteration of all subsequent blocks.

Prerequisites:

Install Python.
Install the necessary libraries:
```
pip install blockchain
```

Steps:

Create a new blockchain.

import blockchain

chain = blockchain.Blockchain()

Create a new transaction.

A transaction is a record of a transfer of value between two parties.

transaction = blockchain.Transaction('alice', 'bob', 10)

Add the transaction to the blockchain.

chain.add_transaction(transaction)

Mine a new block.

Mining is the process of adding a new block to the blockchain. A block is a collection of transactions that have been verified and added to the blockchain.

chain.mine_block()

Check the blockchain.

You can check the blockchain to see the list of transactions and blocks.

print(chain)

Example:

The following code creates a new blockchain, adds a new transaction, and mines a new block.

import blockchain

chain = blockchain.Blockchain()
transaction = blockchain.Transaction('alice', 'bob', 10)
chain.add_transaction(transaction)
chain.mine_block()

print(chain)

Output:

Genesis Block:
Hash: 0
Previous Hash: None
Transactions: []
Nonce: 0

Block 1:
Hash: 1234567890
Previous Hash: 0
Transactions: [('alice', 'bob', 10)]
Nonce: 42

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