On Wed, Dec 20, 2017 at 8:57 AM Ashish Yadav <[email protected]>
wrote:
> I have checked that but still getting the same error.
>
Are you running this under Python3? If so, it would be working in Python
2.x but complaining in Python3 because of your modification on line 16.
Change this:
sha.update(str(self.index) +
str(self.timestamp) +
str(self.data) +
str(self.previous_hash))
To this:
sha.update((str(self.index) +
str(self.timestamp) +
str(self.data) +
str(self.previous_hash)).encode('utf-8'))
Justin
>
> On Wednesday, December 20, 2017 at 12:07:07 AM UTC+5:30, Ravi Jagannadhan
> wrote:
>
>> Paste your code in notepad first, and look for any out of place ascii
>> characters.
>>
>
>> On Tue, Dec 19, 2017 at 9:53 AM, Ashish Yadav <[email protected]>
>> wrote:
>>
>>> 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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>>
>>
>>
>> --
>> Where we have strong emotions, we're liable to fool ourselves - Carl Sagan
>>
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