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change interpolation to format #197

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change interpolation to format #197

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d091425
change interpolation to format
saeidfiy Mar 25, 2021
88f902f
resolve some bug
saeidfiy Mar 25, 2021
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11 changes: 5 additions & 6 deletions blockchain.py
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Original file line number Diff line number Diff line change
Expand Up @@ -47,8 +47,8 @@ def valid_chain(self, chain):

while current_index < len(chain):
block = chain[current_index]
print(f'{last_block}')
print(f'{block}')
print('{}'.format(last_block))
print('{}'.format(block))
print("\n-----------\n")
# Check that the hash of the block is correct
last_block_hash = self.hash(last_block)
Expand Down Expand Up @@ -80,8 +80,7 @@ def resolve_conflicts(self):

# Grab and verify the chains from all the nodes in our network
for node in neighbours:
response = requests.get(f'http://{node}/chain')

response = requests.get('http://{0}/chain'.format(node))
if response.status_code == 200:
length = response.json()['length']
chain = response.json()['chain']
Expand Down Expand Up @@ -186,7 +185,7 @@ def valid_proof(last_proof, proof, last_hash):

"""

guess = f'{last_proof}{proof}{last_hash}'.encode()
guess = '{0}{1}{2}'.format(last_proof,proof,last_hash).encode()
guess_hash = hashlib.sha256(guess).hexdigest()
return guess_hash[:4] == "0000"

Expand Down Expand Up @@ -241,7 +240,7 @@ def new_transaction():
# Create a new Transaction
index = blockchain.new_transaction(values['sender'], values['recipient'], values['amount'])

response = {'message': f'Transaction will be added to Block {index}'}
response = {'message' :'Transaction will be added to Block {}'.format(index)}
return jsonify(response), 201


Expand Down