Arch Linux

Description:
mariadb support is provided by the optional dependency mysql-python.
However python-peewee is built with python 3 while mysql-python is built for python 2.
Installing python-mysqlclient produces the expected output.

Additional info:
* python-peewee 3.13.0-1
* mysql-python 1.2.5-3

Steps to reproduce:
python
Python 3.8.1 (default, Dec 21 2019, 20:57:38)
[GCC 9.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from peewee import *
>>> mysql_db = MySQLDatabase('my_database')
>>> mysql_db.connect()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.8/site-packages/peewee.py", line 2993, in connect
self._state.set_connection(self._connect())
File "/usr/lib/python3.8/site-packages/peewee.py", line 3890, in _connect
raise ImproperlyConfigured('MySQL driver not installed!')
peewee.ImproperlyConfigured: MySQL driver not installed!

Expected output:
python
Python 3.8.1 (default, Dec 21 2019, 20:57:38)
[GCC 9.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from peewee import *
>>> mysql_db = MySQLDatabase('my_database')
>>> mysql_db.connect()
Traceback (most recent call last):
File "/usr/lib/python3.8/site-packages/peewee.py", line 2993, in connect
self._state.set_connection(self._connect())
File "/usr/lib/python3.8/site-packages/peewee.py", line 3891, in _connect
conn = mysql.connect(db=self.database, **self.connect_params)
File "/usr/lib/python3.8/site-packages/MySQLdb/__init__.py", line 84, in Connect
return Connection(*args, **kwargs)
File "/usr/lib/python3.8/site-packages/MySQLdb/connections.py", line 179, in __init__
super(Connection, self).__init__(*args, **kwargs2)
MySQLdb._exceptions.OperationalError: (2002, "Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2)")

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.8/site-packages/peewee.py", line 2996, in connect
self._initialize_connection(self._state.conn)
File "/usr/lib/python3.8/site-packages/peewee.py", line 2831, in __exit__
reraise(new_type, new_type(exc_value, *exc_args), traceback)
File "/usr/lib/python3.8/site-packages/peewee.py", line 183, in reraise
raise value.with_traceback(tb)
File "/usr/lib/python3.8/site-packages/peewee.py", line 2993, in connect
self._state.set_connection(self._connect())
File "/usr/lib/python3.8/site-packages/peewee.py", line 3891, in _connect
conn = mysql.connect(db=self.database, **self.connect_params)
File "/usr/lib/python3.8/site-packages/MySQLdb/__init__.py", line 84, in Connect
return Connection(*args, **kwargs)
File "/usr/lib/python3.8/site-packages/MySQLdb/connections.py", line 179, in __init__
super(Connection, self).__init__(*args, **kwargs2)
peewee.OperationalError: (2002, "Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2)")