LiuFangLu

change if not self.valid_proof(last_block['proof'], block['proof'], last_block['previous_hash']) to if not self.valid_proof(last_block['proof'], block['proof'], block['previous_hash']), try again

change **if not self.valid_proof(last_block['proof'], block['proof'], last_block['previous_hash'])** to **if not self.valid_proof(last_block['proof'], block['proof'], block['previous_hash'])**, try again

i have only one computer,so I create two ports 5000 and 5100 simulate two computer, copy the python file to two, change they port to 5000 and 5100,now we have...