Make multiprocessing work with methods #python

.py

# Make multiprocessing work with methods.  Add this to the beginning of file.
if sys.version_info.major == 2:
    import copy_reg as CReg
else:
    import copyreg as CReg
import types

def _reduce_method(m):
    if m.im_self is None:
        return getattr, (m.im_class, m.im_func.func_name)
    else:
        return getattr, (m.im_self, m.im_func.func_name)
CReg.pickle(types.MethodType, _reduce_method)