[求助] Python 安装第三方库失败问题 (KeyError: 'HOME')

求助，从官网下载的 2.7.10.msi 安装文件装完后， pip 无法安装第三方库，下源码 setup.py 安装也是同样的报错
C:\Users\Vic>pip install request
Collecting request
Using cached request-0.0.2.tar.gz
Complete output from command python setup.py egg_info:
main 1
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "c:\users\vic\appdata\local\temp\pip-build-gukjvj\request\setup.py",
line 11, in <module>
import setup
File "setup\__init__.py", line 74, in <module>
main()
File "setup\__init__.py", line 38, in main
mod = load_module(file,fp,fullpath,('.py', 'rb', PY_SOURCE))
File "c:\users\vic\appdata\local\temp\pip-build-gukjvj\request\setup\.clas
sifiers.py", line 20, in <module>
default = read(join(os.environ["HOME"],".classifiers.txt"))
File "C:\Python27\lib\os.py", line 425, in __getitem__
return self.data[key.upper()]
KeyError: 'HOME'

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\vic\appd
ata\local\temp\pip-build-gukjvj\request
求指导~感谢~