Update client.py

Author: nemoshlag

src/testapps/python/client.py

@@ -16,3 +16,13 @@
 processor = BatchSpanProcessor(span_exporter=exporter)
 trace.set_tracer_provider(provider)
 provider.add_span_processor(processor)
+
+
+async def main():
+    async with aiohttp.ClientSession() as session:
+        async with session.get('http://httpbin.org/get') as resp:
+            print(resp.status)
+            print(await resp.text())
+
+
+asyncio.run(main())