Cythonise fails Cannot convert 'string' to Python object

[nhandtvt]

Hi,
I've installed PyQL. I followed every steps in https://github.com/enthought/pyql/blob/master/docs/source/getting_started.rst
But when compiling pyql, I got the issue:

Cythonizing quantlib/interest_rate.pyx

Error compiling Cython file:
------------------------------------------------------------
...
                cpd_str = "simple compounding up to {0} months," \
                              "then  {1} compounding".format(12/self.frequency, freq_str)
        else:
            ValueError('unknown compounding convention ({0})'.format(self.compounding))
        return "{0:.2f} {1} {2}".format(
            self.rate, self._thisptr.get().dayCounter().name(), cpd_str
                                                           ^
------------------------------------------------------------

quantlib/interest_rate.pyx:104:60: Cannot convert 'string' to Python object
Traceback (most recent call last):
  File "setup.py", line 224, in <module>
    ext_modules = collect_extensions(),
  File "setup.py", line 203, in collect_extensions
    ) for dirpath in cython_extension_directories
  File "/usr/local/lib/python2.7/dist-packages/Cython/Build/Dependencies.py", line 543, in cythonize
    cythonize_one(pyx_file, c_file, quiet, options)
  File "/usr/local/lib/python2.7/dist-packages/Cython/Build/Dependencies.py", line 566, in cythonize_one
    raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: quantlib/interest_rate.pyx

Help me please.
Many thanks

[dpinte]

@nhandtvt What version of Cython do you have?

[nhandtvt]

Hi,
I used Cython 0.16. I fixed that issue by adding c_str() in the last line of quantlib/interest_rate.pyx

return "{0:.2f} {1} {2}".format(
        self.rate, self._thisptr.get().dayCounter().name().c_str(), cpd_str
    )

Thanks.

[dpinte]

@nhandtvt Great. It works fine on 0.19. Closing as fixed.