pip install error

[dachengai]

pip install pesq

Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-install-Z8qhN_/pesq/setup.py", line 10, in
from Cython.Build import cythonize, build_ext
ImportError: No module named Cython.Build

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-Z8qhN_/pesq/