Calling Haskell functions from Python

Question

I want to use some Haskell libraries (e.g. Darcs, Pandoc) from Python, but it seems there’s no direct foreign function interface to Haskell in Python. Is there any way to do

Answer 1

One additional idea: Something less efficient than a direct C binding, but more efficient than shelling out to Haskell is an rpc system such as Apache Thrift: http://incubator.apache.org/thrift/

I've found thrift easy to use, well supported, and reasonably performant. Once you have your Haskell server running, the cost of local communication is fairly cheap, although you pay a bit more in marshalling/unmarshalling than using c types directly.

There are also at least two packages for calling Python from Haskell, missingpy (http://hackage.haskell.org/package/MissingPy) and cpython (http://hackage.haskell.org/package/cpython). The latter claims that support in the other direction is planned -- although you'd have to ask the author if this is still the case, and if so when.