I am trying this in Spyder and getting an issue .
I do not know why ? please help me .
On Tuesday, December 19, 2017 at 10:34:08 PM UTC+5:30, Ashish Yadav wrote:
>
> 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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