title: Python3.6.2 install package cause error
body: <p>python:3.6.2</p>
  
  <p>create virtual environment:</p>
  
  <pre><code>python -m venv venv
  </code></pre>
  
  <p>install package:</p>
  
  <pre><code>pip install flask
  </code></pre>
  
  <p>cause exception:</p>
  
  <pre><code>Exception:
  Traceback (most recent call last):
    File "d:\python36-32\lib\site-packages\pip\basecommand.py", line 215, in main
      status = self.run(options, args)
    File "d:\python36-32\lib\site-packages\pip\commands\install.py", line 342, in run
      prefix=options.prefix_path,
    File "d:\python36-32\lib\site-packages\pip\req\req_set.py", line 784, in install
      **kwargs
    File "d:\python36-32\lib\site-packages\pip\req\req_install.py", line 851, in install
      self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
    File "d:\python36-32\lib\site-packages\pip\req\req_install.py", line 1064, in move_wheel_files
      isolated=self.isolated,
    File "d:\python36-32\lib\site-packages\pip\wheel.py", line 247, in move_wheel_files
      prefix=prefix,
    File "d:\python36-32\lib\site-packages\pip\locations.py", line 141, in distutils_scheme
      d.parse_config_files()
    File "d:\python36-32\lib\distutils\dist.py", line 395, in parse_config_files
      parser.read(filename)
    File "d:\python36-32\lib\configparser.py", line 697, in read
      self._read(fp, filename)
    File "d:\python36-32\lib\configparser.py", line 1015, in _read
      for lineno, line in enumerate(fp, start=1):
  UnicodeDecodeError: 'gbk' codec can't decode byte 0x9d in position 0: incomplete multibyte sequence
  </code></pre>
  
  <p>How to solve it?</p>