Calling a function that returns a hash value: AttributeError: 'tuple' object has no attribute 'encode'

Question

我有以下代码（开发中期）并且 运行 出错了。据我所知，我正在将文本传递给 SHA256 函数，但它表明它是一个元组。

from hashlib import sha256
MAX_NONCE=10000

def SHA256(text):
  return sha256(text.encode("ascii")).hexdigest() #returns a hash value
  
def mine(blockno,transactions,previous_hash,prefix):
  nonce=1
  
  text=str(blockno)+transactions+previous_hash+str(nonce)
  new_hash=SHA256(text)
  print(new_hash)



#STARTING POINT OF THE PROGRAM

transaction =""" 
STUFF HERE

   """
difficulty=3
newhash = mine(7,transaction,"F823482798723897293874982734982F",difficulty)

错误

Traceback (most recent call last):
  File "main.py", line 24, in <module>
    newhash = mine(7,transaction,"F823482798723897293874982734982F",difficulty)
  File "main.py", line 11, in mine
    new_hash=SHA256(text)
  File "main.py", line 5, in SHA256
    return sha256(text.encode("ascii")).hexdigest() #returns a hash value
UnicodeEncodeError: 'ascii' codec can't encode character '\xa3' in position 29: ordinal not in range(128)

repl.it https://replit.com/@teachyourselfpython/WiltedLawngreenInvocation#main.py

Answer 1

这取决于您输入 SHA256(text) 的参数。

文本必须是字符串才能使 encode() 起作用。

您也可以尝试处理元组。

def SHA256(text):
    if type(text) == str:
        return sha256(text.encode("ascii")).hexdigest() #returns a hash value
    else:
        list_of_hashes = []
        for each in text:
            list_of_hashes.append(sha256(text.encode("ascii")).hexdigest())
        return list_of_hashes