Fix async example so that it is runnable

Author: oschwald

README.rst

@@ -104,45 +104,50 @@ Async Web Service Example
 
 .. code-block:: pycon
 
+    >>> import asyncio
+    >>>
     >>> import geoip2.webservice
     >>>
-    >>> # This creates an AsyncClient object that can be reused across
-    >>> # requests on the running event loop. If you are using multiple event
-    >>> # loops, you must ensure the object is not used on another loop.
-    >>> #
-    >>> # Replace "42" with your account ID and "license_key" with your license
-    >>> # key.
-    >>> async with geoip2.webservice.AsyncClient(42, 'license_key') as client:
+    >>> async def main():
+    >>>     # This creates an AsyncClient object that can be reused across
+    >>>     # requests on the running event loop. If you are using multiple event
+    >>>     # loops, you must ensure the object is not used on another loop.
+    >>>     #
+    >>>     # Replace "42" with your account ID and "license_key" with your license
+    >>>     # key.
+    >>>     async with geoip2.webservice.AsyncClient(42, 'license_key') as client:
     >>>
-    >>>     # Replace "insights" with the method corresponding to the web service
-    >>>     # that you are using, e.g., "country", "city".
-    >>>     response = await client.insights('203.0.113.0')
+    >>>         # Replace "insights" with the method corresponding to the web service
+    >>>         # that you are using, e.g., "country", "city".
+    >>>         response = await client.insights('203.0.113.0')
     >>>
-    >>>     response.country.iso_code
+    >>>         response.country.iso_code
     'US'
-    >>>     response.country.name
+    >>>         response.country.name
     'United States'
-    >>>     response.country.names['zh-CN']
+    >>>         response.country.names['zh-CN']
     u'美国'
     >>>
-    >>>     response.subdivisions.most_specific.name
+    >>>         response.subdivisions.most_specific.name
     'Minnesota'
-    >>>     response.subdivisions.most_specific.iso_code
+    >>>         response.subdivisions.most_specific.iso_code
     'MN'
     >>>
-    >>>     response.city.name
+    >>>         response.city.name
     'Minneapolis'
     >>>
-    >>>     response.postal.code
+    >>>         response.postal.code
     '55455'
     >>>
-    >>>     response.location.latitude
+    >>>         response.location.latitude
     44.9733
-    >>>     response.location.longitude
+    >>>         response.location.longitude
     -93.2323
     >>>
-    >>>     response.traits.network
+    >>>         response.traits.network
     IPv4Network('203.0.113.0/32')
+    >>>
+    >>> asyncio.run(main())
 
 Web Service Client Exceptions
 -----------------------------