在我的电脑（WIN10）上运行pip命令的时候出现错误提示：

C:\Windows\system32>pip install requests
Collecting requests
Exception:
Traceback (most recent call last):
  File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "c:\python27\lib\site-packages\pip\commands\install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file
    session=self.session, hashes=hashes)
  File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url
    hashes=hashes
  File "c:\python27\lib\site-packages\pip\download.py", line 659, in unpack_http_url
    hashes)
  File "c:\python27\lib\site-packages\pip\download.py", line 880, in _download_http_url
    file_path = os.path.join(temp_dir, filename)
  File "c:\python27\lib\ntpath.py", line 85, in join
    result_path = result_path + p_path
UnicodeDecodeError: 'ascii' codec can't decode byte 0xcc in position 7: ordinal not in range(128)

提示很明显，就是字符集错误了，Python2的确是有这些字符集问题。

但是我不知道怎么去修改字符集。。。后来在网上搜到相应的解决方案，记录一下：

python目录 Python27\Lib\site-packages 建一个文件sitecustomize.py。内容写：

import sys
sys.setdefaultencoding('gb2312')

python会自动运行这个文件。