Repository: pytorch
Issue: Improve the error message when trying to install in a 32-bit Python environment
Labels: triaged,enhancement

## 🐛 Bug

Trying to install the stable release following instructions from https://pytorch.org/get-started/locally/ results in the message `ERROR: No matching distribution found for torch===1.3.0`.

Trying to install the preview release results in a python error.

## To Reproduce

Steps to reproduce the behavior:

1. Try to install python as instructed in https://pytorch.org/get-started/locally/

**Stable (1.3)** error:
```
Looking in links: https://download.pytorch.org/whl/torch_stable.html
Collecting torch===1.3.0
  ERROR: Could not find a version that satisfies the requirement torch===1.3.0 (from versions: 0.1.2, 0.1.2.post1, 0.1.2.post2)
ERROR: No matching distribution found for torch===1.3.0
```

**Preview (Nightly)** error:
```
Looking in links: https://download.pytorch.org/whl/nightly/cu101/torch_nightly.html
Collecting torch
  Using cached https://files.pythonhosted.org/packages/f8/02/880b468bd382dc79896eaecbeb8ce95e9c4b99a24902874a2cef0b562cea/torch-0.1.2.post2.tar.gz
Collecting torchvision
  Using cached https://files.pythonhosted.org/packages/fb/01/03fd7e503c16b3dc262483e5555ad40974ab5da8b9879e164b56c1f4ef6f/torchvision-0.2.2.post3-py2.py3-none-any.whl
Requirement already satisfied: pyyaml in c:\program files (x86)\python37-32\lib\site-packages (from torch) (5.1.2)
Requirement already satisfied: numpy in c:\program files (x86)\python37-32\lib\site-packages (from torchvision) (1.17.2)
Collecting pillow>=4.1.1 (from torchvision)
  Using cached https://files.pythonhosted.org/packages/6e/42/cbcafb97c5e288a0340bfdffb883faa14cf1e2edd81727f0bac6d0150d4a/Pillow-6.2.0-cp37-cp37m-win32.whl
Collecting six (from torchvision)
  Using cached https://files.pythonhosted.org/packages/73/fb/00a976f728d0d1fecfe898238ce23f502a721c0ac0ecfedb80e0d88c64e9/six-1.12.0-py2.py3-none-any.whl
Installing collected packages: torch, pillow, six, torchvision
  Running setup.py install for torch: started
    Running setup.py install for torch: finished with status 'error'
    ERROR: Command errored out with exit status 1:
     command: 'C:\Program Files (x86)\Python37-32\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\root\\AppData\\Local\\Temp\\pip-install-sdujsaav\\torch\\setup.py'"'"'; __file__='"'"'C:\\Users\\root\\AppData\\Local\\Temp\\pip-install-sdujsaav\\torch\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\root\AppData\Local\Temp\pip-record-q50tvjyk\install-record.txt' --single-version-externally-managed --compile
         cwd: C:\Users\root\AppData\Local\Temp\pip-install-sdujsaav\torch\
    Complete output (23 lines):
    running install
    running build_deps
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\root\AppData\Local\Temp\pip-install-sdujsaav\torch\setup.py", line 265, in <module>
        description="Tensors and Dynamic neural networks in Python with strong GPU acceleration",
      File "C:\Program Files (x86)\Python37-32\lib\site-packages\setuptools\__init__.py", line 145, in setup
        return distutils.core.setup(**attrs)
      File "C:\Program Files (x86)\Python37-32\lib\distutils\core.py", line 148, in setup
        dist.run_commands()
      File "C:\Program Files (x86)\Python37-32\lib\distutils\dist.py", line 966, in run_commands
        self.run_command(cmd)
      File "C:\Program Files (x86)\Python37-32\lib\distutils\dist.py", line 985, in run_command
        cmd_obj.run()
      File "C:\Users\root\AppData\Local\Temp\pip-install-sdujsaav\torch\setup.py", line 99, in run
        self.run_command('build_deps')
      File "C:\Program Files (x86)\Python37-32\lib\distutils\cmd.py", line 313, in run_command
        self.distribution.run_command(command)
      File "C:\Program Files (x86)\Python37-32\lib\distutils\dist.py", line 985, in run_command
        cmd_obj.run()
      File "C:\Users\root\AppData\Local\Temp\pip-install-sdujsaav\torch\setup.py", line 51, in run
        from tools.nnwrap import generate_wrappers as generate_nn_wrappers
    ModuleNotFoundError: No module named 'tools.nnwrap'
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'C:\Program Files (x86)\Python37-32\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\root\\AppData\\Local\\Temp\\pip-install-sdujsaav\\torch\\setup.py'"'"'; __file__='"'"'C:\\Users\\root\\AppData\\Local\\Temp\\pip-install-sdujsaav\\torch\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\root\AppData\Local\Temp\pip-record-q50tvjyk\install-record.txt' --single-version-externally-managed --compile Check the logs for full command output.
```

## Expected behavior

PyTorch gets installed.

## Environment

```
Collecting environment information...
PyTorch version: N/A
Is debug build: N/A
CUDA used to build PyTorch: N/A

OS: Microsoft Windows 10 Pro
GCC version: Could not collect
CMake version: Could not collect

Python version: 3.7
Is CUDA available: N/A
CUDA runtime version: 10.1.243
GPU models and configuration: GPU 0: GeForce GTX 1070 Ti
Nvidia driver version: 436.48
cuDNN version: Could not collect

Versions of relevant libraries:
[pip3] numpy==1.17.2
[conda] Could not collect
```


cc @peterjc123