Below is the python code which i am trying to run on Spyder, but getting an
error.
I have downloaded that code from Internet . Please help me .
Error-* TypeError: encoding without a string argument*
*import hashlib as hasher*
*class Block:*
* def __init__(self, index, timestamp, data, previous_hash):*
* self.index = index*
* self.timestamp = timestamp*
* self.data = data*
* self.previous_hash = previous_hash*
* self.hash = self.hash_block()*
* def hash_block(self):*
* sha = hasher.sha256()*
* sha.update(str(self.index) + *
* str(self.timestamp) + *
* str(self.data) + *
* str(self.previous_hash))*
*# return hashlib.sha256(str(msg).encode('utf-8')).hexdigest()*
* return sha.hexdigest()*
*import datetime as date*
*def create_genesis_block():*
* # Manually construct a block with*
* # index zero and arbitrary previous hash*
* return Block(0, date.datetime.now(), "Genesis Block", "0")*
*def next_block(last_block):*
* this_index = last_block.index + 1*
* this_timestamp = date.datetime.now()*
* this_data = "Hey! I'm block " + str(this_index)*
* this_hash = last_block.hash*
* return Block(this_index, this_timestamp, this_data, this_hash)*
*# Create the blockchain and add the genesis block*
*blockchain = [create_genesis_block()]*
*previous_block = blockchain[0]*
*# How many blocks should we add to the chain*
*# after the genesis block*
*num_of_blocks_to_add = 5*
*# Add blocks to the chain*
*for i in range(0, num_of_blocks_to_add):*
* block_to_add = next_block(previous_block)*
* blockchain.append(block_to_add)*
* previous_block = block_to_add*
* # Tell everyone about it!*
* print ("Block #{} has been added to the
blockchain!".format(block_to_add.index))*
* print ("Hash: {}\n".format(block_to_add.hash))*
Thanks
Ashish
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