No module named 'ConfigSpace'

I use the python 3.5.2 and when i run the entropy_search. It shows that No Module named 'ConfigSpace'. And i put my traceback below.
File "./experiments/fabolas/run_entropy_search.py", line 11, in
from hpolib.benchmarks.ml.svm_benchmark import SvmOnMnist, SvmonVehicle, SvmOnCovertype
File "/usr/local/lib/python3.5/dist-packages/hpolib/benchmarks/ml/svm_benchmark.py", line 4, in
import ConfigSpace as CS
ImportError: No module named 'ConfigSpace'

Start with experiments/fabolas/run_entropy_search.py and the failing import in hpolib/benchmarks/ml/svm_benchmark.py. Reproduce the entropy_search run under Python 3.5.2, then verify that the missing ConfigSpace dependency is available and the command completes without this ImportError.

Written by the indexing model from the issue text.