1 files changed, 13 insertions, 10 deletions
diff --git a/contrib/python/zope.interface/py3/zope/interface/exceptions.py b/contrib/python/zope.interface/py3/zope/interface/exceptions.py
index 0612eb230e..b86fb1e04c 100644
--- a/contrib/python/zope.interface/py3/zope/interface/exceptions.py
+++ b/contrib/python/zope.interface/py3/zope/interface/exceptions.py
@@ -26,6 +26,7 @@ __all__ = [
     'InvalidInterface',
 ]
 
+
 class Invalid(Exception):
     """A specification is violated
     """
@@ -55,7 +56,7 @@ class _TargetInvalid(Invalid):
 
     def _get_arg_or_default(self, ix, default=None):
         try:
-            return self.args[ix] # pylint:disable=unsubscriptable-object
+            return self.args[ix]  # pylint:disable=unsubscriptable-object
         except self._NOT_GIVEN_CATCH:
             return default
 
@@ -92,7 +93,7 @@ class _TargetInvalid(Invalid):
         target = self.target
         if target is self._NOT_GIVEN:
             return "An object"
-        return "The object {!r}".format(target)
+        return f"The object {target!r}"
 
     @property
     def _str_description(self):
@@ -146,7 +147,7 @@ class BrokenImplementation(_TargetInvalid):
 
     @property
     def name(self):
-        return self.args[1] # pylint:disable=unsubscriptable-object
+        return self.args[1]  # pylint:disable=unsubscriptable-object
 
     @property
     def _str_details(self):
@@ -157,7 +158,9 @@ class BrokenImplementation(_TargetInvalid):
 
 class BrokenMethodImplementation(_TargetInvalid):
     """
-    BrokenMethodImplementation(method, message[, implementation, interface, target])
+    BrokenMethodImplementation(
+        method, message[, implementation, interface, target]
+    )
 
     The *target* (optional) has a *method* in *implementation* that violates
     its contract in a way described by *mess*.
@@ -181,11 +184,11 @@ class BrokenMethodImplementation(_TargetInvalid):
 
     @property
     def method(self):
-        return self.args[0] # pylint:disable=unsubscriptable-object
+        return self.args[0]  # pylint:disable=unsubscriptable-object
 
     @property
     def mess(self):
-        return self.args[1] # pylint:disable=unsubscriptable-object
+        return self.args[1]  # pylint:disable=unsubscriptable-object
 
     @staticmethod
     def __implementation_str(impl):
@@ -197,8 +200,7 @@ class BrokenMethodImplementation(_TargetInvalid):
             formatsig = str
         except AttributeError:
             sig = inspect.getargspec
-            f = inspect.formatargspec
-            formatsig = lambda sig: f(*sig) # pylint:disable=deprecated-method
+            formatsig = inspect.formatargspec
 
         try:
             sig = sig(impl)
@@ -248,7 +250,7 @@ class MultipleInvalid(_TargetInvalid):
 
     @property
     def exceptions(self):
-        return self.args[2] # pylint:disable=unsubscriptable-object
+        return self.args[2]  # pylint:disable=unsubscriptable-object
 
     @property
     def _str_details(self):
@@ -259,7 +261,7 @@ class MultipleInvalid(_TargetInvalid):
             for x in self.exceptions
         )
 
-    _str_conjunction = ':' # We don't want a trailing space, messes up doctests
+    _str_conjunction = ':'  # no trailing space, messes up doctests
     _str_trailer = ''
 
 
@@ -267,6 +269,7 @@ class InvalidInterface(Exception):
     """The interface has invalid contents
     """
 
+
 class BadImplements(TypeError):
     """An implementation assertion is invalid