Added asynchronous close method and updated documentation (#211)

examples/async/get_quote.py

@@ -15,7 +15,14 @@ def make_webdriver():
     # Import selenium here because it's slow to import
     from selenium import webdriver
 
-    driver = webdriver.Chrome()
+    # Choose your browser of choice by uncommenting the appropriate line. For
+    # help, see https://selenium-python.readthedocs.io/installation.html#drivers
+
+    #driver = webdriver.Chrome()
+    #driver = webdriver.Firefox()
+    #driver = webdriver.Safari()
+    #driver = webdriver.Edge()
+
     atexit.register(lambda: driver.quit())
     return driver
 
@@ -32,6 +39,11 @@ async def main():
     r = await client.get_quote("AAPL")
     print(r.json())
 
+    # It is highly recommended to close your asynchronous client when you are
+    # done with it. This step isn't strictly necessary, however not doing so
+    # will result in warnings from the async HTTP library.
+    await client.close_async_session()
+
 if __name__ == '__main__':
     import asyncio
     asyncio.run(main())

tda/client/asynchronous.py

@@ -6,6 +6,9 @@
 
 class AsyncClient(BaseClient):
 
+    async def close_async_session(self):
+        await self.session.aclose()
+
     async def _get_request(self, path, params):
         self.ensure_updated_refresh_token()
 

tests/client_test.py

@@ -1495,3 +1495,6 @@ class AsyncClientTest(_TestClient, unittest.TestCase):
     """
     client_class    = ResyncProxy(AsyncClient)
     magicmock_class = AsyncMagicMock
+
+    def test_async_close(self):
+        self.client.close_async_session()