How to use std::function in cython

I've seen here that you can do

from libcpp.string cimport string
from libcpp.vector cimport vector

to refer to parameters of type std::string and std::vector. I need to pass functions to a c++ method expecting std::function<>. I tried doing

from libcpp.function cimport function

but that didn't work:

from libcpp.function cimport function
^
------------------------------------------------------------

cython_topics.pyx:3:0: 'libcpp/function/function.pxd' not found
Traceback (most recent call last):
  File "setup.py", line 18, in <module>
    language="c++",                   # generate and compile C++ code
  File "/usr/lib64/python2.7/site-packages/Cython/Build/Dependencies.py", line 934, in cythonize
    cythonize_one(*args)
  File "/usr/lib64/python2.7/site-packages/Cython/Build/Dependencies.py", line 1056, in cythonize_one
    raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: cython_topics.pyx

What's the right way to call a c++ function expecting std::function<>?