cestdoe

I had the same error as described above. @aleju, please checkout the script dataset/generate_dataset.py in line 130, I changed the value of mode to 'constant' and It runs until stops...

 OS: Windows 10 Home Python: 2.7.14 Terminal: Windows Powershell of Visual Studio Code version 1.19.1 command: ```python .\generate_dataset.py --path="../lfw"``` (lfw is in the root of repository) cwd: repo_root/dataset