Avoided lru_cache due mypy problems

python/mypy#5107

Author: ssbarnea

src/molecule_docker/driver.py

@@ -183,6 +183,8 @@ class Docker(Driver):
     .. _`CMD`: https://docs.docker.com/engine/reference/builder/#cmd
     """  # noqa
 
+    _passed_sanity = False
+
     def __init__(self, config=None):
         """Construct Docker."""
         super(Docker, self).__init__(config)
@@ -224,11 +226,12 @@ def ansible_connection_options(self, instance_name):
             x["ansible_docker_extra_args"] = f"-H={os.environ['DOCKER_HOST']}"
         return x
 
-    @cache(maxsize=None)
     def sanity_checks(self):
         """Implement Docker driver sanity checks."""
-        log.info("Sanity checks: '%s'", self._name)
+        if self._passed_sanity:
+            return
 
+        log.info("Sanity checks: '%s'", self._name)
         try:
             import docker
             import requests
@@ -243,6 +246,8 @@ def sanity_checks(self):
             )
             sysexit_with_message(msg)
 
+        self._passed_sanity = True
+
     def reset(self):
         import docker