我更新了skimage软件包。
pip install --upgrade scikit-image
问题解决了。这是Skimage版本的问题，已在0.14.2中解决。PLus，此版本非常稳定。
Installing collected packages: dask, scikit-image Found existing installation: dask 0.19.1 Uninstalling dask-0.19.1: Successfully uninstalled dask-0.19.1 Found existing installation: scikit-image 0.13.0 Uninstalling scikit-image-0.13.0: Successfully uninstalled scikit-image-0.13.0Successfully installed dask-1.0.0 scikit-image-0.14.2
