cannot import name 'HOST' from 'config' (C:\Users\Administrator\PycharmProjects\pythonProject1\venv\lib\site-packages\config\__init__.py)

This error occurs because the module or package 'config' does not have a variable or function named 'HOST'. Double-check if the variable or function is defined in the correct module or package, and if it is, make sure you are importing it correctly.

相关问题

报错C:\Users\Administrator\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Administrator/PycharmProjects/pythonProject/main.py Traceback (most recent call last): File "C:/Users/Administrator/PycharmProjects/pythonProject/main.py", line 3, in <module> conn = pymysql.connect(host='localhost', user='root', password='password') File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\connections.py", line 352, in __init__ self.connect() File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\connections.py", line 636, in connect self._request_authentication() File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\connections.py", line 911, in _request_authentication auth_packet = self._read_packet() File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\connections.py", line 729, in _read_packet packet.raise_for_error() File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\protocol.py", line 221, in raise_for_error err.raise_mysql_exception(self._data) File "C:\Users\Administrator\PycharmProjects\pythonProject\venv\lib\site-packages\pymysql\err.py", line 143, in raise_mysql_exception raise errorclass(errno, errval) pymysql.err.OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: YES)")

这个错误提示是因为连接MySQL数据库时，用户名或密码不正确，你需要检查一下你的用户名和密码是否正确。同时，也需要确保你的MySQL服务器已经启动，并且允许远程连接。

如果你忘记了MySQL的用户名和密码，可以尝试使用以下命令来重置密码：

1. 停止MySQL服务

sudo service mysql stop

2. 以跳过授权方式启动MySQL

sudo mysqld_safe --skip-grant-tables --skip-networking &

3. 使用root用户登录MySQL

mysql -u root

4. 切换到mysql数据库

use mysql;

5. 更新root用户的密码

update user set authentication_string=password('your_new_password') where user='root' and Host ='localhost';

6. 刷新权限

flush privileges;

7. 退出MySQL并重新启动服务

exit;
sudo service mysql start

然后，你可以使用新的密码来连接你的MySQL数据库了。

Traceback (most recent call last): File "D:\文档\pythonProject\venv\40-44.py", line 47, in <module> RET_ = pd.merge(RET,R2,on='Yearmon',how='left') File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 158, in merge return op.get_result(copy=copy) File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 805, in get_result join_index, left_indexer, right_indexer = self._get_join_info() File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 1053, in _get_join_info (left_indexer, right_indexer) = self._get_join_indexers() File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 1026, in _get_join_indexers return get_join_indexers( File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 1647, in get_join_indexers zipped = zip(*mapped) File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 1644, in <genexpr> _factorize_keys(left_keys[n], right_keys[n], sort=sort, how=how) File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 2388, in _factorize_keys klass, lk, rk = _convert_arrays_and_get_rizer_klass(lk, rk) File "D:\文档\pythonProject\venv\lib\site-packages\pandas\core\reshape\merge.py", line 2467, in _convert_arrays_and_get_rizer_klass klass = _factorizers[lk.dtype.type] KeyError: <class 'numpy.intc'>

这个错误是由于在使用`pd.merge()`函数合并数据时，出现了`KeyError`。根据错误信息，发现无法找到与`<class 'numpy.intc'>`类型对应的因子化器（factorizer）。这可能是因为在数据合并过程中，左侧（`RET`）或右侧（`R2`）的列中包含了不支持的数据类型。

你可以尝试检查一下`RET`和`R2`的数据类型，确保要合并的列具有相同的数据类型。如果有不同的数据类型，可以尝试将其转换为相同的数据类型，例如使用`.astype()`方法将整数类型转换为浮点数类型。

另外，你还可以检查一下是否需要更新你使用的pandas库，确保使用的是最新版本，以免遇到已知的问题或错误。