Documentation

ToPy instances indicate that a type can be marshalled from Haskell to Python automatically

For example, ToPy Integer indicates that we know how to take a Haskell Integer and convert it into a Python int object

FromPy instances indicate that a type can be marshalled from Python to Haskell automatically

For example, FromPy Integer indicates that we know how to take some Python object and convert it into a Haskell Integer. If the Python object is int, then we can cast properly. Failed casts throw a PyCastException

An exception representing a failed cast from a Python object to Haskell value, usually because the expected type of the Python object was not correct.

Carries a String which represents the name of the expected Haskell type which caused a failed cast. If using easyFromPy, this String is found with typeRep

Helper that lets you convert a Haskell value to a Python object by providing both a Python conversion function (from the Haskell type, over FFI, to some Python Object) as well as the Haskell value

Lets you define toPy with just a Python conversion function

Helper that takes a conversion function and a Python object, and casts the Python object into a Haskell value.

Lets you define fromPy with just a Python conversion function

We use Proxy to infer the type name for use in case of a failed cast. In the context of defining an instance, this type will be inferrable, so you can just provide a Proxy value