pip install遇到编码问题

以前pip都是好用的，今天装flask的时候他莫名报了个错

Downloading/unpacking flask
Cleaning up...
Exception:
Traceback (most recent call last):
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\basecommand.py", line 122, in main
    status = self.run(options, args)
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\commands\install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\req.py", line 1197,in prepare_files
    do_download,
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\req.py", line 1375,in unpack_url
    self.session,
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\download.py", line 571, in unpack_http_url
    temp_location = os.path.join(temp_dir, filename)
  File "D:\Python\lib\ntpath.py", line 83, in join
    result_path = result_path + p_path
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd5 in position 7: ordinalnot in range(128)

Traceback (most recent call last):
  File "D:\Python\Scripts\pip-script.py", line 9, in 
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\__init__.py", line 185, in main
    return command.main(cmd_args)
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\basecommand.py", line 161, in main
    text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd5 in position 34: ordinal not in range(128)

主要还是这一句

UnicodeDecodeError: 'ascii' codec can't decode byte 0xd5 in position 34: ordinal not in range(128)

是编码的问题，这个以前是遇到过的，在刚安装pip的时候也这样，那时候在python安装路径的Lib\site-packages下放了个sitecustomize.py就搞定了，内容是加上编码设定：

import sys
reload(sys)
sys.setdefaultencoding('utf-8')

但这次好像没起作用，再看错误里这句

Traceback (most recent call last):
  File "D:\Python\lib\site-packages\pip-1.5.6-py2.7.egg\pip\basecommand.py", line 122, in main
    status = self.run(options, args)

最外层的调用入口是basecommand.py,于是就去basecommand.py里同样加上了这两句：

import sys
reload(sys)
sys.setdefaultencoding('utf-8')

然后再跑又报错说：

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5 in position 34: ordinal not in range(128)

他说utf-8也不行，现在基本我可以确定是我的某些路径有中文字符，而且还不是utf-8的，于是在basecommand.py里写上

import sys
reload(sys)
sys.setdefaultencoding('gbk')

ok,搞定了。

这中间还有一次遇到一个问题是我原来只写了

import sys
sys.setdefaultencoding('utf-8')

他会报一个这样的错，

AttributeError: 'module' object has no attribute 'setdefaultencoding'

说没有setdefaultencoding这个东西，这也是我在编辑sys.setdefaultencoding时为什么老是得不到提示的原因，查了一下，就是说早些版本的python是只要写这两句就可以了，而较高的python必须要reload(sys)一下。