pycodestyle: Do not use bare 'except:'

A bare 'except:' catches all exceptions [1], including SystemExit,
KeyboardInterrupt, and GeneratorExit (which is not an error and should
not normally be caught by user code). In situations where you need to
catch all “normal” errors, you can catch the base class for all normal
exceptions, Exception [2].

[1] https://docs.python.org/2/howto/doanddont.html#except
[2] https://docs.python.org/2/library/exceptions.html#Exception

setup.py

@@ -422,7 +422,7 @@ class TestBaseCommand(distutils.core.Command):
         try:
             import coverage
             use_cov = True
-        except:
+        except ImportError:
             use_cov = False
             cov = None
 
@@ -439,10 +439,8 @@ class TestBaseCommand(distutils.core.Command):
         testsmodule.utils.REGENERATE_OUTPUT = bool(self.regenerate_output)
 
         if hasattr(unittest, "installHandler"):
-            try:
-                unittest.installHandler()
-            except:
-                print("installHandler hack failed")
+            # Install the control-c handler.
+            unittest.installHandler()
 
         tests = unittest.TestLoader().loadTestsFromNames(self._testfiles)
         if self.only: