bitcoinbook/code/hash_example.py

# example of iterating a nonce in a hashing algorithm's input

from __future__ import print_function
import hashlib

text = "I am Satoshi Nakamoto"

# iterate nonce from 0 to 19
for nonce in range(20):

    # add the nonce to the end of the text
    input_data = text + str(nonce) 
     
    # calculate the SHA-256 hash of the input (text+nonce)
    hash_data = hashlib.sha256(input_data).hexdigest() 
    
    # show the input and hash result
    print(input_data, '=>',  hash_data)
hash generator and difficulty content 2013-08-18 22:35:38 +00:00			`# example of iterating a nonce in a hashing algorithm's input`

from __future__ import print_function 2017-09-06 05:23:23 +00:00			`from __future__ import print_function`
hash generator and difficulty content 2013-08-18 22:35:38 +00:00			`import hashlib`
from __future__ import print_function 2017-09-06 05:23:23 +00:00
hash generator and difficulty content 2013-08-18 22:35:38 +00:00			`text = "I am Satoshi Nakamoto"`

review comments from Allyson MacDonald 2014-09-25 16:02:07 +00:00			`# iterate nonce from 0 to 19`
from __future__ import print_function 2017-09-06 05:23:23 +00:00			`for nonce in range(20):`

review comments from Allyson MacDonald 2014-09-25 16:02:07 +00:00			`# add the nonce to the end of the text`
Update hash_example.py As input and hash are inbuilt functions, so I'd suggest using other names for variables. here is output from python interpreter. >>> hash <built-in function hash> >>> input <built-in function input> 2017-12-10 06:05:50 +00:00			`input_data = text + str(nonce)`
review comments from Allyson MacDonald 2014-09-25 16:02:07 +00:00
			`# calculate the SHA-256 hash of the input (text+nonce)`
Update hash_example.py As input and hash are inbuilt functions, so I'd suggest using other names for variables. here is output from python interpreter. >>> hash <built-in function hash> >>> input <built-in function input> 2017-12-10 06:05:50 +00:00			`hash_data = hashlib.sha256(input_data).hexdigest()`
review comments from Allyson MacDonald 2014-09-25 16:02:07 +00:00
			`# show the input and hash result`
Use of print function from Python 3 requires () 2018-02-02 22:29:36 +00:00			`print(input_data, '=>', hash_data)`