from maskrcnn_benchmark import _c

[Randy66]

cannot import name '_c' ：if replace this line with from _util import _c ?

[Menoly-xin]

you must follow the instructions provided by https://github.com/facebookresearch/maskrcnn-benchmark/blob/master/INSTALL.md to install Maskrcnn_benchmark.

[xiyufeng2]

作者你好，出现这个问题是您的readme中少写了一步：进入gliding vertex项目后也要执行python setup.py build develop。