'DatabaseError' is not being caught by mysql.connector.errors.DatabaseError python
Question:
I am using SQLAlchemy and mysql-connector. While executing a query, if I get mysql.connector.errors.DatabaseError I have used the exception provided by mysql.
The exception is going in the Exception block and not in the DatabaseError catch block.
Code
try:
row_exists = None
session_object = self.connect_to_database()
# check if the value exists or not
try:
if session_object.query(
exists().where(
ConnectorRequest.CR_Context_Key == input_context['Context_Key'])).scalar():
row_exists = True
else:
row_exists = False
except DatabaseError as mysql_error:
logger.error('Error connecting to the MYSQL Server.Invalid database IP or Port provided' +
f'nError-{str(mysql_error)}', exc_info=True)
# close the session_object
session_object.close()
return row_exists
except Exception as error:
logger.error('Error in exists query of the database' +
f'nException - {str(error)}', exc_info=True)
- Error caught in
Exception
(mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)
(Background on this error at: https://sqlalche.me/e/14/4xp6)
- Stacktrace
{"asctime": "2023-02-01 13:53:45,195", "levelname": "ERROR", "module": "Helper", "funcName": "check_if_file_is_already_processed", "process": 22216,
"message": "Error in exists query of the databasenException - (mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)n(Background on this error at: https://sqlalche.me/e/14/4xp6)",
"exc_info": "Traceback (most recent call last):n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 232, in _open_connectionn self._cmysql.connect(**cnx_kwargs)n_mysql_connector.MySQLInterfaceError: Can't connect to MySQL server on '10.10.1.00:3306' (101)nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3361, in _wrap_pool_connectn return fn()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 327, in connectn return _ConnectionFairy._checkout(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 894, in _checkoutn fairy = _ConnectionRecord.checkout(pool)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 493, in checkoutn rec = pool._do_get()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 146, in _do_getn self._dec_overflow()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 143, in _do_getn return self._create_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 273, in _create_connectionn return _ConnectionRecord(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 388, in __init__n self.__connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 691, in __connectn pool.logger.debug("Error on connect(): %s", e)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 686, in __connectn self.dbapi_connection = connection = pool._invoke_creator(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/create.py", line 578, in connectn return dialect.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line 598, in connectn return self.dbapi.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/__init__.py", line 272, in connectn return CMySQLConnection(*args, **kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 85, in __init__n self.connect(**kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/abstracts.py", line 1003, in connectn self._open_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 235, in _open_connectionn sqlstate=exc.sqlstate)nmysql.connector.errors.DatabaseError: 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)nnThe above exception was the direct cause of the following exception:nnTraceback (most recent call last):n File "/home/usr/Workarea-2/usr/pycharm_project/toyota_finance_service/python_module/folder_listener_connector/folder_listener_connector/Helper.py", line 155, in check_if_file_is_already_processedn ConnectorRequest.CR_Context_Key == input_context['Connector_Context_Key'])).scalar():n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2893, in scalarn ret = self.one()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2870, in onen return self._iter().one()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2919, in _itern execution_options={"_sa_orm_load_options": self.load_options},n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 1713, in executen conn = self._connection_for_bind(bind)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 1553, in _connection_for_bindn engine, execution_optionsn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 747, in _connection_for_bindn conn = bind.connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3315, in connectn return self._connection_cls(self, close_with_result=close_with_result)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 96, in __init__n else engine.raw_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3394, in raw_connectionn return self._wrap_pool_connect(self.pool.connect, _connection)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3365, in _wrap_pool_connectn e, dialect, selfn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 2199, in _handle_dbapi_exception_noconnectionn sqlalchemy_exception, with_traceback=exc_info[2], from_=en File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3361, in _wrap_pool_connectn return fn()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 327, in connectn return _ConnectionFairy._checkout(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 894, in _checkoutn fairy = _ConnectionRecord.checkout(pool)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 493, in checkoutn rec = pool._do_get()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 146, in _do_getn self._dec_overflow()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 143, in _do_getn return self._create_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 273, in _create_connectionn return _ConnectionRecord(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 388, in __init__n self.__connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 691, in __connectn pool.logger.debug("Error on connect(): %s", e)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 686, in __connectn self.dbapi_connection = connection = pool._invoke_creator(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/create.py", line 578, in connectn return dialect.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line 598, in connectn return self.dbapi.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/__init__.py", line 272, in connectn return CMySQLConnection(*args, **kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 85, in __init__n self.connect(**kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/abstracts.py", line 1003, in connectn self._open_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 235, in _open_connectionn sqlstate=exc.sqlstate)nsqlalchemy.exc.DatabaseError: (mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)n(Background on this error at: https://sqlalche.me/e/14/4xp6)"}
Answers:
The exception is sqlalchemy.exc.DatabaseError; SQLAlchemy wraps the error from the DB-API connector (here MySQL-Connector) but displays the details from it.
So you need to do
from sqlalchemy.exc import DatabaseError
...
try:
# something
except DatabaseError:
# handle exception
I am using SQLAlchemy and mysql-connector. While executing a query, if I get mysql.connector.errors.DatabaseError I have used the exception provided by mysql.
The exception is going in the Exception block and not in the DatabaseError catch block.
Code
try:
row_exists = None
session_object = self.connect_to_database()
# check if the value exists or not
try:
if session_object.query(
exists().where(
ConnectorRequest.CR_Context_Key == input_context['Context_Key'])).scalar():
row_exists = True
else:
row_exists = False
except DatabaseError as mysql_error:
logger.error('Error connecting to the MYSQL Server.Invalid database IP or Port provided' +
f'nError-{str(mysql_error)}', exc_info=True)
# close the session_object
session_object.close()
return row_exists
except Exception as error:
logger.error('Error in exists query of the database' +
f'nException - {str(error)}', exc_info=True)
- Error caught in
Exception
(mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)
(Background on this error at: https://sqlalche.me/e/14/4xp6)
- Stacktrace
{"asctime": "2023-02-01 13:53:45,195", "levelname": "ERROR", "module": "Helper", "funcName": "check_if_file_is_already_processed", "process": 22216,
"message": "Error in exists query of the databasenException - (mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)n(Background on this error at: https://sqlalche.me/e/14/4xp6)",
"exc_info": "Traceback (most recent call last):n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 232, in _open_connectionn self._cmysql.connect(**cnx_kwargs)n_mysql_connector.MySQLInterfaceError: Can't connect to MySQL server on '10.10.1.00:3306' (101)nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3361, in _wrap_pool_connectn return fn()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 327, in connectn return _ConnectionFairy._checkout(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 894, in _checkoutn fairy = _ConnectionRecord.checkout(pool)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 493, in checkoutn rec = pool._do_get()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 146, in _do_getn self._dec_overflow()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 143, in _do_getn return self._create_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 273, in _create_connectionn return _ConnectionRecord(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 388, in __init__n self.__connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 691, in __connectn pool.logger.debug("Error on connect(): %s", e)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 686, in __connectn self.dbapi_connection = connection = pool._invoke_creator(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/create.py", line 578, in connectn return dialect.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line 598, in connectn return self.dbapi.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/__init__.py", line 272, in connectn return CMySQLConnection(*args, **kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 85, in __init__n self.connect(**kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/abstracts.py", line 1003, in connectn self._open_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 235, in _open_connectionn sqlstate=exc.sqlstate)nmysql.connector.errors.DatabaseError: 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)nnThe above exception was the direct cause of the following exception:nnTraceback (most recent call last):n File "/home/usr/Workarea-2/usr/pycharm_project/toyota_finance_service/python_module/folder_listener_connector/folder_listener_connector/Helper.py", line 155, in check_if_file_is_already_processedn ConnectorRequest.CR_Context_Key == input_context['Connector_Context_Key'])).scalar():n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2893, in scalarn ret = self.one()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2870, in onen return self._iter().one()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 2919, in _itern execution_options={"_sa_orm_load_options": self.load_options},n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 1713, in executen conn = self._connection_for_bind(bind)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 1553, in _connection_for_bindn engine, execution_optionsn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/orm/session.py", line 747, in _connection_for_bindn conn = bind.connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3315, in connectn return self._connection_cls(self, close_with_result=close_with_result)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 96, in __init__n else engine.raw_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3394, in raw_connectionn return self._wrap_pool_connect(self.pool.connect, _connection)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3365, in _wrap_pool_connectn e, dialect, selfn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 2199, in _handle_dbapi_exception_noconnectionn sqlalchemy_exception, with_traceback=exc_info[2], from_=en File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 3361, in _wrap_pool_connectn return fn()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 327, in connectn return _ConnectionFairy._checkout(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 894, in _checkoutn fairy = _ConnectionRecord.checkout(pool)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 493, in checkoutn rec = pool._do_get()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 146, in _do_getn self._dec_overflow()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/impl.py", line 143, in _do_getn return self._create_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 273, in _create_connectionn return _ConnectionRecord(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 388, in __init__n self.__connect()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 691, in __connectn pool.logger.debug("Error on connect(): %s", e)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 72, in __exit__n with_traceback=exc_tb,n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 211, in raise_n raise exceptionn File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/pool/base.py", line 686, in __connectn self.dbapi_connection = connection = pool._invoke_creator(self)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/create.py", line 578, in connectn return dialect.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line 598, in connectn return self.dbapi.connect(*cargs, **cparams)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/__init__.py", line 272, in connectn return CMySQLConnection(*args, **kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 85, in __init__n self.connect(**kwargs)n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/abstracts.py", line 1003, in connectn self._open_connection()n File "/home/usr/Workarea-2/usr/python_proj_env/folder_listener_connector_venv/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 235, in _open_connectionn sqlstate=exc.sqlstate)nsqlalchemy.exc.DatabaseError: (mysql.connector.errors.DatabaseError) 2003 (HY000): Can't connect to MySQL server on '10.10.1.00:3306' (101)n(Background on this error at: https://sqlalche.me/e/14/4xp6)"}
The exception is sqlalchemy.exc.DatabaseError; SQLAlchemy wraps the error from the DB-API connector (here MySQL-Connector) but displays the details from it.
So you need to do
from sqlalchemy.exc import DatabaseError
...
try:
# something
except DatabaseError:
# handle exception