Issue @ preprocessing

[WangYC-99]

Hi, thanks for your bravo work.
I follow your installing instructions but come across a problem when preprocessing the roberta-classifier data:

/usr/local/anaconda3/envs/lewis/bin/python: Error while finding module specification for 'examples.roberta.multiprocessing_bpe_encoder' (ModuleNotFoundError: No module named 'examples')
/usr/local/anaconda3/envs/lewis/bin/python: Error while finding module specification for 'examples.roberta.multiprocessing_bpe_encoder' (ModuleNotFoundError: No module named 'examples')

I haven't used fairseq before, could you help me find out what's wrong? Thx in advance :)

[FayeXXX]

The same error occured in my reproduction.