Add flake8-bugbear

fix B009 Do not call getattr with a constant attribute value, it is not any safer than normal property access.

Author: philpep

testinfra/utils/__init__.py

@@ -20,7 +20,7 @@ class cached_property:
     """  # noqa
 
     def __init__(self, func):
-        self.__doc__ = getattr(func, '__doc__')
+        self.__doc__ = func.__doc__
         self.func = func
 
     def __get__(self, obj, cls):

tox.ini

@@ -16,7 +16,10 @@ passenv=HOME TRAVIS DOCKER_CERT_PATH DOCKER_HOST DOCKER_TLS_VERIFY WSL_DISTRO_NA
 
 [testenv:lint]
 description = Performs linting tasks
-deps=hacking
+deps=
+  flake8
+  hacking
+  flake8-bugbear
 commands=flake8 {posargs}
 
 [testenv:docs]