{ stdenv, buildPythonPackage, fetchPypi , nose, pyparsing, decorator, six, future }: buildPythonPackage rec { pname = "PyContracts"; version = "1.8.6"; src = fetchPypi { inherit pname version; sha256 = "8b6ad8750bbb712b1c7b8f89772b42baeefd35b3c7085233e8027b92f277e073"; }; buildInputs = [ nose ]; propagatedBuildInputs = [ pyparsing decorator six future ]; meta = with stdenv.lib; { description = "Allows to declare constraints on function parameters and return values"; homepage = https://pypi.python.org/pypi/PyContracts; license = licenses.lgpl2; }; }