安装Python27后，配置好环境变量，运行pip list出现如下错误
Traceback (most recent call last):
File "d:\app\python\python27\lib\runpy.py", line 174, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "d:\app\python\python27\lib\runpy.py", line 72, in _run_code
exec code in run_globals
File "D:\app\Python\Python27\Scripts\pip.exe\__main__.py", line 5, in <module>
File "d:\app\python\python27\lib\site-packages\pip\__init__.py", line 45, in <module>
from pip.vcs import git, mercurial, subversion, bazaar # noqa
File "d:\app\python\python27\lib\site-packages\pip\vcs\mercurial.py", line 9, in <module>
from pip.download import path_to_url
File "d:\app\python\python27\lib\site-packages\pip\download.py", line 37, in <module>
from pip.utils.ui import DownloadProgressBar, DownloadProgressSpinner
File "d:\app\python\python27\lib\site-packages\pip\utils\ui.py", line 57, in <module>
_BaseBar = _select_progress_class(IncrementalBar, Bar)
File "d:\app\python\python27\lib\site-packages\pip\utils\ui.py", line 50, in _select_progress_class
six.text_type().join(characters).encode(encoding)
LookupError: unknown encoding: cp65001
这个错误意味着脚本试图打印的Unicode字符不能使用当前控制台字符编码表示。
在执行pip后尝试运行set PYTHONIOENCODING=UTF-8，设置环境变量编码格式为UTF-8
