autodoc execute_interactive

add to BlockingKernelClient docstring

Author: minrk

docs/api/client.rst

@@ -37,3 +37,7 @@ client - communicating with kernels
    .. automethod:: get_iopub_msg
 
    .. automethod:: get_stdin_msg
+
+.. autoclass:: BlockingKernelClient
+
+   .. automethod:: execute_interactive

jupyter_client/blocking/client.py

@@ -70,7 +70,11 @@ def wrapped(self, *args, **kwargs):
     return wrapped
 
 class BlockingKernelClient(KernelClient):
-    """A BlockingKernelClient """
+    """A KernelClient with blocking APIs
+    
+    ``get_[channel]_msg()`` methods wait for and return messages on channels,
+    raising :exc:`queue.Empty` if no message arrives within ``timeout`` seconds.
+    """
 
     def wait_for_ready(self, timeout=None):
         """Waits for a response when a client is blocked
@@ -213,6 +217,8 @@ def execute_interactive(self, code, silent=False, store_history=True,
         You can pass a custom output_hook callable that will be called
         with every IOPub message that is produced instead of the default redisplay.
 
+        .. versionadded:: 5.0
+
         Parameters
         ----------
         code : str