input: 
  def print_blockchain():
      """
      Print the details of each block in the blockchain in a human-readable format.
      >>> print_blockchain()
      Block 0: Index: 0 Timestamp: 2023-10-01 12:00:00 Data: Genesis Block Previous Hash: 0 Hash: a9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9e0
      Block 1: Index: 1 Timestamp: 2023-10-01 12:01:00 Data: First Transaction Previous Hash: a9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9e0 Hash: b9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9f0
      """
  
output:     blockchain = [
          {
              "index": 0,
              "timestamp": "2023-10-01 12:00:00",
              "data": "Genesis Block",
              "previous_hash": "0",
              "hash": "a9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9e0"
          },
          {
              "index": 1,
              "timestamp": "2023-10-01 12:01:00",
              "data": "First Transaction",
              "previous_hash": "a9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9e0",
              "hash": "b9e1b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9f0"
          }
      ]
  
      for block in blockchain:
          print(f"Block {block['index']}: Index: {block['index']} Timestamp: {block['timestamp']} Data: {block['data']} Previous Hash: {block['previous_hash']} Hash: {block['hash']}")