我正在尝试安装 linecache2，它具有 pbr 的先决条件。
我去了 pypi，并通过下载并运行 setup.py build 安装了 pbr，因为我在防火墙后面：
cd C:\Users\<user_name>\Downloads\pbr-1.5.0\pbr-1.5.0
python setup.py build
然后我去了linecache，并尝试使用相同的方法安装它：
cd C:\Users\<user_name>\Downloads\linecache2-1.0.0\linecache2-1.0.0
python setup.py build
但是，它输出：
Download error on https://pypi.python.org/simple/pbr/: timed out -- Some packages may not be found!
Couldn't find index page for 'pbr' (maybe misspelled?)
Download error on https://pypi.python.org/simple/: timed out -- Some packages may not be found!
No local packages or download links found for pbr
Traceback (most recent call last):
File "setup.py", line 5, in <module>
pbr=True)
File "C:\Python27\lib\distutils\core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "C:\Python27\lib\site-packages\setuptools\dist.py", line 268, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "C:\Python27\lib\site-packages\setuptools\dist.py", line 313, in fetch_build_eggs
replace_conflicting=True,
File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 830, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 1075, in best_match
return self.obtain(req, installer)
File "C:\Python27\lib\site-packages\pkg_resources\__init__.py", line 1087, in obtain
return installer(requirement)
File "C:\Python27\lib\site-packages\setuptools\dist.py", line 380, in fetch_build_egg
return cmd.easy_install(req)
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 623, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pbr')
既然我已经有了pbr，为什么还要去找pbr呢？
任何帮助是极大的赞赏！谢谢！