readline install failed

[acmol]

As illustrated in this picture, pip install readline failed but the build continued.

The building scripts should be improved to build readline success and to detect this kind of errors.

[fanyeren]

you show give more details

[acmol]

When we build bigflow, we will use pip install readline in this file: bigflow_python/build_python.sh

Sometimes it will fail. But I guess maybe it's the network problem. But we should check if it fails to install the python libs, and throw the errors up.