Comment by throwaway7808

Type-safe format strings should never be mixed with plain strings, constant strings, byte strings, unicode strings, batteries strings, byte array strings, char array strings, string buffers or any other type of string supported by ocaml. Keep your types pure and never mix them with any other types. Never. And you will never have any problem. And these python developers are lunatics. It is preposterous to use 'if' condition on a Date object and expect anything good. Idiots. They should have at least written a type-safe wrapper.