Pytorch includes Caffe2?

Does this mean that on my ubuntu 16.04 with Cuda 9.0 and cuDNN 7

I can run conda install pytorch torchvision cuda90 -c pytorch and

Pytorch will be installed with Caffe2 ???

no caffe2 wont be there


what about the github repository?
If I run python install will pytorch be installed with caffe2?
what is the purpose behind ?

Looking forward to clarification in this.

Thank you sir