Python2 Config Dict

When passing a dict as config parameters I get
 
     File "pycupid/pycupid.pyx", line 164, in pycupid.pycupid.fellwalker (pycupid/pycupid.c:4013)
     File "pycupid/pycupid.pyx", line 173, in pycupid.pycupid._findclumps (pycupid/pycupid.c:4363)
     TypeError: str() takes at most 1 argument (2 given)

