安装virtualenv后，开始虚拟环境但一直报这个错误

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Pycharm 中 virtualenv、pipenv、conda 虚拟环境的用法在网上找了好一些资料，发现介绍 Python 虚拟环境的不多，而介绍 Pycharm 虚拟环境的就更少了，本文主要是介绍 Pycharm 中的虚拟环境，而非 Python 中的命令式虚拟环境。前言虚拟环境的通俗介绍虚拟环境和非虚拟环境该怎么选？通过 Virtualenv 方式创建虚拟环境通过 Pipenv 方式创建虚拟环境通过 Conda 方式创建虚拟环境 requirements.txt 的用法 Pipfile 文件的用法阅读详情

安装virtualenv后，开始虚拟环境但一直报这个错误

G:\>virtualenv test
New python executable in test\Scripts\python.exe
Installing setuptools, pip, wheel...
Complete output from command G:\test\Scripts\python.exe -c "import sys, pip; s
ys...d\"] + sys.argv[1:]))" setuptools pip wheel:
Ignoring indexes: https://pypi.python.org/simple
Collecting setuptools
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
The repository located at None is not a trusted or secure host and is being ig
nored. If this repository is available via HTTPS it is recommended to use HTTPS
instead, otherwise you may silence this warning and allow it anyways with '--tru
sted-host None'.
Could not find a version that satisfies the requirement setuptools (from versi
ons: )
No matching distribution found for setuptools
----------------------------------------
...Installing setuptools, pip, wheel...done.
Traceback (most recent call last):
File "D:\program files\Python27\Scripts\virtualenv-script.py", line 9, in <mod
ule>
load_entry_point('virtualenv==13.1.0', 'console_scripts', 'virtualenv')()
File "D:\Program Files\Python27\lib\site-packages\virtualenv-13.1.0-py2.7.egg\
virtualenv.py", line 832, in main
symlink=options.symlink)
File "D:\Program Files\Python27\lib\site-packages\virtualenv-13.1.0-py2.7.egg\
virtualenv.py", line 1004, in create_environment
install_wheel(to_install, py_executable, search_dirs)
File "D:\Program Files\Python27\lib\site-packages\virtualenv-13.1.0-py2.7.egg\
virtualenv.py", line 969, in install_wheel
'PIP_NO_INDEX': '1'
File "D:\Program Files\Python27\lib\site-packages\virtualenv-13.1.0-py2.7.egg\
virtualenv.py", line 910, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command G:\test\Scripts\python.exe -c "import sys, pip; sys...d\"] + sy
s.argv[1:]))" setuptools pip wheel failed with error code 1

请问到底出了什么问题，怎么解决？我现在用的是win8.1 64bit python环境2.7.10 64bit

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