In [1]: import fakeredis                                                                                                                                                                                                                                                                                                   

In [2]: r = fakeredis.FakeStrictRedis()                                                                                                                                                                                                                                                                                    

In [3]: r.set('a', 'b')                                                                                                                                                                                                                                                                                                    
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-3-9aae901f3e7b> in <module>
----> 1 r.set('a', 'b')

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/client.py in set(self, name, value, ex, px, nx, xx)
   1449         if xx:
   1450             pieces.append('XX')
-> 1451         return self.execute_command('SET', *pieces)
   1452 
   1453     def __setitem__(self, name, value):

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/elasticapm/instrumentation/packages/base.py in call_if_sampling(self, module, method, wrapped, instance, args, kwargs)
    103         transaction = get_transaction()
    104         if not transaction or not transaction.is_sampled:
--> 105             return wrapped(*args, **kwargs)
    106         else:
    107             return self.call(module, method, wrapped, instance, args, kwargs)

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/elasticapm/instrumentation/packages/base.py in call_if_sampling(self, module, method, wrapped, instance, args, kwargs)
    103         transaction = get_transaction()
    104         if not transaction or not transaction.is_sampled:
--> 105             return wrapped(*args, **kwargs)
    106         else:
    107             return self.call(module, method, wrapped, instance, args, kwargs)

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/client.py in execute_command(self, *args, **options)
    770         pool = self.connection_pool
    771         command_name = args[0]
--> 772         connection = pool.get_connection(command_name, **options)
    773         try:
    774             connection.send_command(*args)

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/connection.py in get_connection(self, command_name, *keys, **options)
    992         try:
    993             # ensure this connection is connected to Redis
--> 994             connection.connect()
    995             # connections that the pool provides should be ready to send
    996             # a command. if not, the connection was either returned to the

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/connection.py in connect(self)
    498 
    499         self._sock = sock
--> 500         self._selector = DefaultSelector(sock)
    501         try:
    502             self.on_connect()

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/selector.py in DefaultSelector(sock)
    194         else:
    195             raise RedisError('Platform does not support any selectors')
--> 196     return _DEFAULT_SELECTOR(sock)

~/.local/share/virtualenvs/api-fKmI9ai6/lib/python3.6/site-packages/redis/selector.py in __init__(self, sock)
    122             super(PollSelector, self).__init__(sock)
    123             self.read_poller = select.poll()
--> 124             self.read_poller.register(sock, self._READ_POLLER_MASK)
    125             self.ready_poller = select.poll()
    126             self.ready_poller.register(sock, self._READY_POLLER_MASK)

TypeError: argument must be an int, or have a fileno() method.