Correct nightly installation instructions

[vincentqb]

Fixes #545

[mthrok]

@seemethere @vincentqb This still installs 0.4.0

$ conda create --name testenv python=3.7
...
$ conda activate testenv
$ pip install numpy
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Collecting numpy
  Downloading numpy-1.18.2-cp37-cp37m-manylinux1_x86_64.whl (20.2 MB)
     |████████████████████████████████| 20.2 MB 17.5 MB/s
Installing collected packages: numpy
Successfully installed numpy-1.18.2
$ pip install torchaudio -f https://download.pytorch.org/whl/nightly/torch_nightly.html
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Looking in links: https://download.pytorch.org/whl/nightly/torch_nightly.html
Collecting torchaudio
  Using cached torchaudio-0.4.0-cp37-cp37m-manylinux1_x86_64.whl (3.1 MB)
Collecting torch==1.4.0
  Downloading https://download.pytorch.org/whl/nightly/cu92/torch-1.4.0%2Bcu92-cp37-cp37m-linux_x86_64.whl (640.6 MB)
     |████████████████████████████████| 640.6 MB 3.9 kB/s
Installing collected packages: torch, torchaudio
Successfully installed torch-1.4.0+cu92 torchaudio-0.4.0

[seemethere]

@seemethere @vincentqb This still installs 0.4.0

$ conda create --name testenv python=3.7
...
$ conda activate testenv
$ pip install numpy
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Collecting numpy
  Downloading numpy-1.18.2-cp37-cp37m-manylinux1_x86_64.whl (20.2 MB)
     |████████████████████████████████| 20.2 MB 17.5 MB/s
Installing collected packages: numpy
Successfully installed numpy-1.18.2
$ pip install torchaudio -f https://download.pytorch.org/whl/nightly/torch_nightly.html
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Looking in links: https://download.pytorch.org/whl/nightly/torch_nightly.html
Collecting torchaudio
  Using cached torchaudio-0.4.0-cp37-cp37m-manylinux1_x86_64.whl (3.1 MB)
Collecting torch==1.4.0
  Downloading https://download.pytorch.org/whl/nightly/cu92/torch-1.4.0%2Bcu92-cp37-cp37m-linux_x86_64.whl (640.6 MB)
     |████████████████████████████████| 640.6 MB 3.9 kB/s
Installing collected packages: torch, torchaudio
Successfully installed torch-1.4.0+cu92 torchaudio-0.4.0

Oh right you'll also need to use the --pre flag:

pip install --pre  torchaudio -f https://download.pytorch.org/whl/nightly/torch_nightly.html

[mthrok]

👍

$ pip install --pre  torchaudio -f https://download.pytorch.org/whl/nightly/torch_nightly.html
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Looking in links: https://download.pytorch.org/whl/nightly/torch_nightly.html
Collecting torchaudio
  Downloading https://download.pytorch.org/whl/nightly/torchaudio-0.5.0.dev20200414-cp37-cp37m-linux_x86_64.whl (3.1 MB)
     |████████████████████████████████| 3.1 MB 2.2 MB/s
Collecting torch==1.6.0.dev20200414+cu92
  Downloading https://download.pytorch.org/whl/nightly/cu92/torch-1.6.0.dev20200414%2Bcu92-cp37-cp37m-linux_x86_64.whl (606.4 MB)
     |████████████████████████████████| 606.4 MB 31 kB/s
Collecting future
  Using cached future-0.18.2.tar.gz (829 kB)
Requirement already satisfied: numpy in /private/home/moto/miniconda3/envs/testenv/lib/python3.7/site-packages (from torch==1.6.0.dev20200414+cu92->torchaudio) (1.18.2)
Building wheels for collected packages: future
  Building wheel for future (setup.py) ... done
  Created wheel for future: filename=future-0.18.2-py3-none-any.whl size=491058 sha256=befa36b3ed3bb1e32b43578cad3b9a142661a841dac66152e18fd1ba6bb55565
  Stored in directory: /private/home/moto/.cache/pip/wheels/56/b0/fe/4410d17b32f1f0c3cf54cdfb2bc04d7b4b8f4ae377e2229ba0
Successfully built future
Installing collected packages: future, torch, torchaudio
Successfully installed future-0.18.2 torch-1.6.0.dev20200414+cu92 torchaudio-0.5.0.dev20200414

FYI: if an old version is installed, they have to be manually removed.

$ pip install --pre  torchaudio -f https://download.pytorch.org/whl/nightly/torch_nightly.html
Looking in indexes: https://pypi.org/simple, http://100.97.64.150
Looking in links: https://download.pytorch.org/whl/nightly/torch_nightly.html
Requirement already satisfied: torchaudio in /private/home/moto/miniconda3/envs/testenv/lib/python3.7/site-packages (0.4.0)
Requirement already satisfied: torch==1.4.0 in /private/home/moto/miniconda3/envs/testenv/lib/python3.7/site-packages (from torchaudio) (1.4.0+cu92)