Traceback (most recent call last): File "/usr/bin/mailman", line 33, in <module> sys.exit(load_entry_point('mailman==3.3.3', 'console_scripts', 'mailman')()) File "/usr/lib/python3/dist-packages/click/core.py", line 829, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 781, in main with self.make_context(prog_name, args, **extra) as ctx: File "/usr/lib/python3/dist-packages/click/core.py", line 700, in make_context self.parse_args(ctx, args) File "/usr/lib/python3/dist-packages/click/core.py", line 1212, in parse_args rest = Command.parse_args(self, ctx, args) File "/usr/lib/python3/dist-packages/click/core.py", line 1048, in parse_args value, args = param.handle_parse_result(ctx, opts, args) File "/usr/lib/python3/dist-packages/click/core.py", line 1630, in handle_parse_result value = invoke_param_callback(self.callback, ctx, self, value) File "/usr/lib/python3/dist-packages/click/core.py", line 123, in invoke_param_callback return callback(ctx, param, value) File "/usr/lib/python3/dist-packages/mailman/bin/mailman.py", line 94, in initialize_config initialize(value) File "/usr/lib/python3/dist-packages/mailman/core/initialize.py", line 218, in initialize initialize_2(propagate_logs=propagate_logs) File "/usr/lib/python3/dist-packages/mailman/core/initialize.py", line 177, in initialize_2 config.db = getUtility(IDatabaseFactory, utility_name).create() File "/usr/lib/python3/dist-packages/mailman/database/factory.py", line 54, in create database.initialize() File "/usr/lib/python3/dist-packages/mailman/database/base.py", line 106, in initialize self.engine = create_engine( File "/usr/lib/python3/dist-packages/sqlalchemy/engine/__init__.py", line 520, in create_engine return strategy.create(*args, **kwargs) File "/usr/lib/python3/dist-packages/sqlalchemy/engine/strategies.py", line 87, in create dbapi = dialect_cls.dbapi(**dbapi_args) File "/usr/lib/python3/dist-packages/sqlalchemy/dialects/mysql/pymysql.py", line 62, in dbapi return __import__("pymysql") ModuleNotFoundError: No module named 'pymysql'