api: Implement /users/me/<stream_id>/topics.

zulip/zulip/__init__.py

@@ -848,6 +848,16 @@ class Client(object):
             request=None,
         )
 
+    def get_stream_topics(self, stream_id):
+        # type: (int) -> Dict[str, Any]
+        '''
+            See examples/get-stream-topics for example usage.
+        '''
+        return self.call_endpoint(
+            url='users/me/{}/topics'.format(stream_id),
+            method='GET'
+        )
+
     def get_subscribers(self, **request):
         # type: (**Any) -> Dict[str, Any]
         '''

zulip/zulip/examples/get-stream-topics

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import argparse
+
+usage = """get-stream-topics --stream-id=<stream-id> [options]
+
+Get all the topics for a specific stream.
+"""
+
+import zulip
+
+parser = zulip.add_default_arguments(argparse.ArgumentParser(usage=usage))
+parser.add_argument('--stream-id', required=True)
+options = parser.parse_args()
+
+client = zulip.init_from_options(options)
+
+print(client.get_stream_topics(options.stream_id))