Added a single doc string

2 files changed, 2 insertions, 0 deletions

diff --git a/python2/futures/_base.py b/python2/futures/_base.py
index cad304f..e90c288 100644
--- a/python2/futures/_base.py
+++ b/python2/futures/_base.py
@@ -472,6 +472,7 @@ class FutureList(object):
                 states[FINISHED]))
 
 class Executor(object):
+    """This is an abstract base class for concrete asynchronous executors."""
     def run_to_futures(self, calls, timeout=None, return_when=ALL_COMPLETED):
         """Return a list of futures representing the given calls.
 
diff --git a/python3/futures/_base.py b/python3/futures/_base.py
index 72d76ee..01cbf64 100644
--- a/python3/futures/_base.py
+++ b/python3/futures/_base.py
@@ -403,6 +403,7 @@ class FutureList(object):
                 states[FINISHED]))
 
 class Executor(object):
+    """THis is an abstract base class for conrete asynchronous executors."""
     def run_to_futures(self, calls, timeout=None, return_when=ALL_COMPLETED):
         """Return a list of futures representing the given calls.