./train.sh: line 21: paddle: command not found

[bethleekor]

I try to run quick_start demo.
get_data.sh and preprocess.sh is worked but train.sh is not worked.
./train.sh: line 21: paddle: command not found

How can I run train.sh?

paddle*.whl is installed in
./paddle/build/python/dist/paddle-0.8.0b0-py2-none-any.whl
./paddle/opt/paddle/share/wheels/paddle-0.8.0b0-py2-none-any.whl
and my python version is 2.7.12