使用python 3.6解码utf-8字符串

Question

我尝试对成功编码的utf-8字符串进行解码，但无法弄清楚如何对其进行解码...实际上，它的解码效果非常好，但我只想将其与以下内容连接：

b = base64.b64decode(a).decode("utf-8", "ignore")
print('Decoding:'+b)

就像我通过编码所做的一样

a = str(base64.b64encode(bytes('hasni zinda ha u are my man boy yes u are ', "utf-8")))
print('Encoding :'+a)

每当我尝试以我想要的方式进行操作时，都会出现以下错误：

File "C:/Users/…/python/first.py", line 8, in <module>
  b = base64.b64decode(a).decode("utf-8", "ignore")
File "C:\Users\…\AppData\Local\Programs\Python\Python36-32\lib\base64.py", line 87, in b64decode
  return binascii.a2b_base64(s) binascii.Error: Incorrect padding

谁能帮我解决这个问题？

Answer 1

继续上述我的评论 。

解码Base64编码的字符串时，必须反转操作顺序：

>>> s = "hasni zinda ha u are my man boy yes u are "
# Encode the Python str into bytes.
>>> b = s.encode("utf-8")
# Base64 encode the bytes.
>>> s_b64 = base64.b64encode(b)
>>> print("Encoding: " + str(s_b64))
Encoding: b'aGFzbmkgemluZGEgaGEgdSBhcmUgbXkgbWFuIGJveSB5ZXMgdSBhcmUg'

现在您有了编码的字符串，解码的顺序相反：

# Base64 decode the encoded string into bytes.
>>> b = base64.b64decode(s_b64)
# Decode the bytes into str.
>>> s = b.decode("utf-8")
print("Decoding: " + s)
Decoding: hasni zinda ha u are my man boy yes u are 

有关更多详细信息，请参见b64encode()和b64decode()的文档，以及Base64的“ 输出填充”部分（需要确保将Base64编码的字符串的长度可除以4）。

要使用两条线：

>>> a = base64.b64encode(bytes("hasni zinda ha u are my man boy yes u are ", "utf-8"))
>>> print("Encoding:", a)
Encoding: b'aGFzbmkgemluZGEgaGEgdSBhcmUgbXkgbWFuIGJveSB5ZXMgdSBhcmUg'
>>> b = base64.b64decode(a).decode("utf-8")
>>> print("Decoding:", b)
Decoding: hasni zinda ha u are my man boy yes u are