以mysql作为后端的initdb不工作

当我使用mysql作为后端初始化气流时，我看到下面的错误

第453行，连接中 返回self.dbapi.connect（*cargs，**cparams） 文件“/usr/local/lib/python3.7/site packages/MySQLdb/init.py”，第80行， 连接 从MySQLdb.connections导入连接 文件“/usr/local/lib/python3.7/site packages/MySQLdb/connections.py”，第行 36 提高errorclass，errorvalue ^ SyntaxError:无效语法

我尝试重新安装mysql-python和pymysql，但仍然没有改变
气流初始数据库
/usr/local/lib/python3.7/site-packages/afflow/configuration.py:627:DeprecationWarning:您有两个afflow.cfg文件：/home/afflow/afflow/afflow.cfg和/home/afflow/afflow.cfg。气流过去用于查看~/aiffair/aiffair.cfg，即使将aiffair_HOME设置为不同的值。气流现在将仅读取/home/aiffair/aiffair.cfg，您应该删除另一个文件
类别=弃用警告，
[2019-09-2412:10:32310]{settings.py:213}INFO-settings.configure_orm（）：使用池设置。池大小=5，最大溢出=10，池回收=1800，pid=15403
[2019-09-2412:10:32508]{uuuuu init\uuuuuu.py:51}信息-使用executor LocalExecutor
DB:mysql://airdba:***@主机/空气动力总成
[2019-09-2412:10:32820]{db.py:369}信息-创建表
回溯（最近一次呼叫最后一次）：
文件“/usr/local/bin/afflow”，第32行，在
args.func（args）
initdb中的文件“/usr/local/lib/python3.7/site packages/afflow/bin/cli.py”，第1102行
initdb（settings.RBAC）
文件“/usr/local/lib/python3.7/site-packages/afflow/utils/db.py”，第106行，在initdb中
升级数据库（）
文件“/usr/local/lib/python3.7/site packages/afflow/utils/db.py”，第377行，upgradedb格式
command.upgrade（配置“heads”）
文件“/usr/local/lib/python3.7/site packages/alembic/command.py”，第298行，在升级中
script.run_env（）
文件“/usr/local/lib/python3.7/site packages/alembic/script/base.py”，第489行，在run_env中
加载python文件（self.dir，“env.py”）
文件“/usr/local/lib/python3.7/site packages/alembic/util/pyfiles.py”，第98行，在load\u python\u文件中
模块=加载模块（模块id，路径）
文件“/usr/local/lib/python3.7/site packages/alembic/util/compat.py”，第173行，在加载模块中
规格加载器执行模块（模块）
exec_模块中第728行的文件“”
文件“”，第219行，在“调用”中，删除了“帧”
文件“/usr/local/lib/python3.7/site packages/afflow/migrations/env.py”，第92行，在
运行_迁移_联机（）
文件“/usr/local/lib/python3.7/site packages/afflow/migrations/env.py”，第78行，运行在线迁移
使用connectable.connect（）作为连接：
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/base.py”，第2206行，在connect中
返回self.\u连接\u cls（self，**kwargs）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/base.py”，第103行，在__
else引擎原始连接（）
原始连接中的文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/base.py”，第2306行
self.pool.unique\u连接，\u连接
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/base.py”，第2275行，在“包装”池中
返回fn（）
文件“/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py”，第303行，处于唯一连接中
返回\u连接\u签出（自我）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/base.py”，第760行，in\u签出
fairy=\u ConnectionRecord.checkout（池）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/base.py”，第492行，在签出中
rec=pool.\u do\u get（）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/impl.py”，第139行，在
self._dec_overflow（）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/util/langhelpers.py”，第68行，在__
兼容性（exc_类型、exc_值、exc_tb）
文件“/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py”，第153行，重新登录
增值
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/impl.py”，第136行，在
返回self.\u创建\u连接（）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/base.py”，第308行，在“创建”连接中
返回连接记录（自身）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/base.py”，第437行，在__
自我连接（第一次连接检查=真）
文件“/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py”，第639行，在连接中
连接=池。\u调用\u创建者（自身）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/strategies.py”，第114行，在connect中
返回方言。连接（*cargs，**cparams）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/default.py”，第453行，在connect中
返回self.dbapi.connect（*cargs，**cparams）
文件“/usr/local/lib/python3.7/site packages/MySQLdb/_init__.py”，第80行，在Connect中
从MySQLdb.connections导入连接
文件“/usr/local/lib/python3.7/site packages/MySQLdb/connections.py”，第36行
提高errorclass，errorvalue
^
SyntaxError:无效语法
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/pool/base.py”，第437行，在__
自我连接（第一次连接检查=真）
文件“/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py”，第639行，在连接中
连接=池。\u调用\u创建者（自身）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/strategies.py”，第114行，在connect中
返回方言。连接（*cargs，**cparams）
文件“/usr/local/lib/python3.7/site packages/sqlalchemy/engine/default.py”，第453行，在connect中
返回self.dbapi.connect（*cargs，**cparams）
文件“/usr/local/lib/python3.7/site packages/MySQLdb/_init__.py”，第80行，在Connect中
从MySQLdb.connections导入连接
文件“/usr/local/lib/python3.7/site-packages/MySQLdb/connections
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py",

I tried re-installing mysql-python and pymysql still its same 

airflow initdb
/usr/local/lib/python3.7/site-packages/airflow/configuration.py:627: DeprecationWarning: You have two airflow.cfg files: /home/airflow/airflow/airflow.cfg and /home/airflow/airflow.cfg. Airflow used to look at ~/airflow/airflow.cfg, even when AIRFLOW_HOME was set to a different value. Airflow will now only read /home/airflow/airflow.cfg, and you should remove the other file
  category=DeprecationWarning,
[2019-09-24 12:10:32,310] {settings.py:213} INFO - settings.configure_orm(): Using pool settings. pool_size=5, max_overflow=10, pool_recycle=1800, pid=15403
[2019-09-24 12:10:32,508] {__init__.py:51} INFO - Using executor LocalExecutor
DB: mysql://airdba:***@host/airflow_main
[2019-09-24 12:10:32,820] {db.py:369} INFO - Creating tables
Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 32, in <module>
    args.func(args)
  File "/usr/local/lib/python3.7/site-packages/airflow/bin/cli.py", line 1102, in initdb
    db.initdb(settings.RBAC)
  File "/usr/local/lib/python3.7/site-packages/airflow/utils/db.py", line 106, in initdb
    upgradedb()
  File "/usr/local/lib/python3.7/site-packages/airflow/utils/db.py", line 377, in upgradedb
    command.upgrade(config, 'heads')
  File "/usr/local/lib/python3.7/site-packages/alembic/command.py", line 298, in upgrade
    script.run_env()
  File "/usr/local/lib/python3.7/site-packages/alembic/script/base.py", line 489, in run_env
    util.load_python_file(self.dir, "env.py")
  File "/usr/local/lib/python3.7/site-packages/alembic/util/pyfiles.py", line 98, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python3.7/site-packages/alembic/util/compat.py", line 173, in load_module_py
    spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/usr/local/lib/python3.7/site-packages/airflow/migrations/env.py", line 92, in <module>
    run_migrations_online()
  File "/usr/local/lib/python3.7/site-packages/airflow/migrations/env.py", line 78, in run_migrations_online
    with connectable.connect() as connection:
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2206, in connect
    return self._connection_cls(self, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 103, in __init__
    else engine.raw_connection()
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2306, in raw_connection
    self.pool.unique_connection, _connection
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2275, in _wrap_pool_connect
    return fn()
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 303, in unique_connection
    return _ConnectionFairy._checkout(self)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 760, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 492, in checkout
    rec = pool._do_get()
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/impl.py", line 139, in _do_get
    self._dec_overflow()
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 153, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/impl.py", line 136, in _do_get
    return self._create_connection()
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 308, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 437, in __init__
    self.__connect(first_connect_check=True)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 639, in __connect
    connection = pool._invoke_creator(self)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 453, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.7/site-packages/MySQLdb/__init__.py", line 80, in Connect
    from MySQLdb.connections import Connection
  File "/usr/local/lib/python3.7/site-packages/MySQLdb/connections.py", line 36
    raise errorclass, errorvalue
                    ^
SyntaxError: invalid syntax


  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 437, in __init__
    self.__connect(first_connect_check=True)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 639, in __connect
    connection = pool._invoke_creator(self)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 453, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.7/site-packages/MySQLdb/__init__.py", line 80, in Connect
    from MySQLdb.connections import Connection
  File "/usr/local/lib/python3.7/site-packages/MySQLdb/connections.py", line 36
    raise errorclass, errorvalue
                    ^
SyntaxError: invalid syntax