add python

til.md

@@ -317,3 +317,17 @@ aws_secret_access_key = ...
 and do
 
   ./goofys --endpoint ams3.digitaloceanspaces.com melmac /home/ec2-user/t/
+
+# python
+
+Python json dump with datetime. every time `JSON` doesn't know how to convert a value, it calls 
+the `default()` function.
+
+```
+def dtconverter(o):
+    if isinstance(o, datetime.datetime):
+        return o.__str__()
+
+print(json.dumps(my_py_dict_var, default = dtconverter))
+
+```