feat: Added a BlockChain snippet to Python

codes/Python/Blockchain.py

@@ -0,0 +1,40 @@
+from hashlib import sha384
+from datetime import datetime
+
+class Block:
+ def __init__(self, timestamp, data, previous_hash = ""):
+ self.timestamp = timestamp
+ self.previous_hash = previous_hash
+ self.hash = ''
+ self.data = data
+ self.make_hash()
+
+ def make_hash(self):
+ self.hash = sha384(f"{self.timestamp}42{self.previous_hash}91{str(self.data)}".encode()).hexdigest()
+ return self.hash
+
+class BlockChain:
+ def __init__(self):
+ self.chain = [Block('0/0/0000', 'Genesis Block', '0000')] # Adding the first-Genesis block
+
+ def get_last_block(self) -> Block:
+ return self.chain[-1]
+
+ def add_block(self, block:Block):
+ block.previous_hash = self.get_last_block().hash
+ block.hash = block.make_hash()
+ self.chain.append(block)
+
+chain = BlockChain()
+
+chain.add_block(Block(
+ timestamp=str(datetime.now()),
+ data={
+ 'name': 'Hello there! :D',
+ 'date_added': str(datetime.now())
+ }
+))
+
+# for block in chain.chain:
+# print("Hash:",block.hash)
+# print("Data:",block.data)