Fix: wrong python types for python message publisher create (eclipse-…

…ecal#515)

* Should fix eclipse-ecal#514 (wrong python types for python message publisher create)

lang/python/core/ecal/core/core.py

@@ -158,7 +158,7 @@ def pub_create(topic_name, topic_type, topic_desc):
   :param topic_type: optional type name
   :type topic_type: string
   :param topic_desc: optional type description
-  :type topic_desc: string
+  :type topic_desc: bytes
 
   """
   topic_handle = _ecal.pub_create(topic_name, topic_type)
@@ -180,8 +180,8 @@ def pub_set_description(topic_handle, description):
 
   :param topic_handle: the topic handle
   :type topic_handle: string
-  :param description:  the publisher description
-  :type description: string
+  :param description:  the topic description
+  :type description: bytes
 
   """
   return _ecal.pub_set_description(topic_handle, description)
@@ -244,7 +244,7 @@ def pub_send(topic_handle, msg_payload, msg_time=-1):
 
   :param topic_handle: the topic handle
   :param msg_payload:  message python string (can contain zeros)
-  :type msg_payload:   string
+  :type msg_payload:   bytes
   :param msg_time:     optional message time in us (default -1 == eCAL system time)
   :type msg_time:      int
 
@@ -257,7 +257,7 @@ def sub_create(topic_name, topic_type):
 
   :param topic_name: the unique topic name
   :type topic_name:  string
-  :param topic_type: optional type description
+  :param topic_type: optional topic type
   :type topic_type:  string
   
   """
@@ -469,7 +469,7 @@ def client_call_method(client_handle, method_name, request, timeout = -1):
   :param method_name:   the method name to call
   :type  method_name:   string
   :param request:       the request argument for the method
-  :type  request:       string
+  :type  request:       bytes
   :param timeout:       maximum time before operation returns (in milliseconds, -1 means infinite)
   :type  timeout:       integer
 
@@ -563,7 +563,7 @@ def __init__(self, topic_name, topic_type="", topic_desc=b""):
     :param topic_type: optional type name
     :type topic_type:  string
     :param topic_desc: optional type description
-    :type topic_desc:  string
+    :type topic_desc:  bytes
 
     """
     # topic name
@@ -624,7 +624,7 @@ def send(self, msg_payload, msg_time=-1):
     """ send publisher content
 
     :param msg_payload: message python string (can contain zeros)
-    :type msg_payload:  string
+    :type msg_payload:  bytes
     :param msg_time:    optional message time in us (default -1 == eCAL system time)
     :type msg_time:     int
 
@@ -641,7 +641,7 @@ def __init__(self, topic_name, topic_type=""):
 
     :param topic_name: the unique topic name
     :type topic_name:  string
-    :param topic_type: optional type description
+    :param topic_type: optional topic type
     :type topic_type:  string
 
     """

lang/python/core/ecal/core/publisher.py

@@ -25,7 +25,7 @@ class MessagePublisher(object):
   Classes inheriting from this class need to implement the 
   :func:`~msg_publisher.msg_publisher.send` function.
   """
-  def __init__(self, name, topic_type="", topic_descriptor=""):
+  def __init__(self, name, topic_type="", topic_descriptor=b""):
     """ Initialize a message publisher
 
     :param name:             subscription name of the publisher
@@ -34,7 +34,7 @@ def __init__(self, name, topic_type="", topic_descriptor=""):
     :type topic_type:        string
     :param topic_descriptor: optional, a string which can be registered with ecal to allow io
       reflection features
-    :type topic_descriptor:  string
+    :type topic_descriptor:  bytes
 
     """
     self.c_publisher = ecal_core.publisher(name, topic_type, topic_descriptor)