执行pymysql.connect时出现错误键255

Question

以下是代码

import pymysql
pymysql.connect(
    host='localhost',
    port=3306,
    user='root',
    password='iDontWannaSay',
    db='iDontWannaShow',
    charset='utf8'
)

错误回溯是：

data is :::::b'\xff\x02\x00\xff\x81\x15'....##### I was add near line 1279 which is print("data is :::::%s...."%data[i:i+6])
Traceback (most recent call last):
  File "C:\Users\123\Desktop\pymysqldebug.py", line 8, in <module>
    charset='utf8'
  File "D:\Program Files (x86)\Python\Python35\lib\site-packages\pymysql\__init__.py", line 90, in Connect
    return Connection(*args, **kwargs)
  File "D:\Program Files (x86)\Python\Python35\lib\site-packages\pymysql\connections.py", line 709, in __init__
    self.connect()
  File "D:\Program Files (x86)\Python\Python35\lib\site-packages\pymysql\connections.py", line 934, in connect
    self._get_server_information()
  File "D:\Program Files (x86)\Python\Python35\lib\site-packages\pymysql\connections.py", line 1279, in _get_server_information
    self.server_charset = charset_by_id(lang).name
  File "D:\Program Files (x86)\Python\Python35\lib\site-packages\pymysql\charset.py", line 39, in by_id
    return self._by_id[id]
KeyError: 255

看起来像是struct.unpack方法将'\xff\‘解析为255并分配给self.server_language，无论传递的是否是非空字符集参数。

这是MySQL版本问题吗？(版本8.0.1-dmr)

Answer 1

要扩展上述只接受链接的答案，请考虑在当前的pymysql安装中进行以下更改。在MySQL 8中，mysql-python API不能识别可能较新的字符集，因此不能识别引发的KeyError。

要解决此问题，请在以下目录中的pymysql模块下找到connectors.py脚本：

print(pymysql.__file__)

备份原始connectors.py脚本。然后合并以下更改。

原始(1268-1269行)

self.server_language = lang
self.server_charset = charset_by_id(lang).name  

替换( 1268 -1272行)

self.server_language = lang
try:
    self.server_charset = charset_by_id(lang).name
except KeyError:
    self.server_charset = None

注意在上面的行缩进中包含隐藏的制表符。

参考

• PyMySQL Git fix #591

Answer 2

但是你的变量在哪里呢？

import pymysql

    |
    v
myVariable = pymysql.connect(
    host='localhost',
    port=3306,
    user='root',
    password='iDontWannaSay',
    db='iDontWannaShow',
    charset='utf8'
)