运行环境：windows 8.1
python：2.7.6
在安装的时候，我使用的pip来进行安装,命令如下：
代码如下:
pip install beautifulsoup4
运行的时候，报错如下：
代码如下:
exception:
traceback (most recent call last):
  file j:\program files (x86)\python\python27\lib\site-packages\pip\basecomm
.py, line 122, in main
    status = self.run(options, args)
  file j:\program files (x86)\python\python27\lib\site-packages\pip\commands
stall.py, line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bu
e=self.bundle)
  file j:\program files (x86)\python\python27\lib\site-packages\pip\req.py,
ne 1229, in prepare_files
    req_to_install.run_egg_info()
  file j:\program files (x86)\python\python27\lib\site-packages\pip\req.py,
ne 292, in run_egg_info
    logger.notify('running setup.py (path:%s) egg_info for package %s' % (sel
etup_py, self.name))
  file j:\program files (x86)\python\python27\lib\site-packages\pip\req.py,
ne 265, in setup_py
    import setuptools
  file build\bdist.win-amd64\egg\setuptools\__init__.py, line 11, in     from setuptools.extension import extension
  file build\bdist.win-amd64\egg\setuptools\extension.py, line 5, in   file build\bdist.win-amd64\egg\setuptools\dist.py, line 15, in
  file build\bdist.win-amd64\egg\setuptools\compat.py, line 19, in
  file j:\program files (x86)\python\python27\lib\simplehttpserver.py, line
, in
    class simplehttprequesthandler(basehttpserver.basehttprequesthandler):
  file j:\program files (x86)\python\python27\lib\simplehttpserver.py, line
8, in simplehttprequesthandler
    mimetypes.init() # try to read system mime.types
  file j:\program files (x86)\python\python27\lib\mimetypes.py, line 358, i
nit
    db.read_windows_registry()
  file j:\program files (x86)\python\python27\lib\mimetypes.py, line 258, i
ead_windows_registry
    for subkeyname in enum_types(hkcr):
  file j:\program files (x86)\python\python27\lib\mimetypes.py, line 249, i
num_types
    ctype = ctype.encode(default_encoding) # omit in 3.x!
unicodedecodeerror: 'ascii' codec can't decode byte 0xb0 in position 1: ordin
not in range(128)
storing debug log for failure in c:\users\administrator\pip\pip.log
解决方法：打开c:\python27\lib下的 mimetypes.py 文件，找到大概256行的
代码如下:
default_encoding = sys.getdefaultencoding()
改成：
代码如下:
if sys.getdefaultencoding() != 'gbk':
    reload(sys)
    sys.setdefaultencoding('gbk')
default_encoding = sys.getdefaultencoding()
安装成功后，验证是否安装成功：
代码如下:
c:\users\administrator>python
python 2.7.6 (default, nov 10 2013, 19:24:24) [msc v.1500 64 bit (amd64)] on 32
type help, copyright, credits or license for more information.
>>> from bs4 import beautifulsoup
>>> exit()
如果“from bs4 import beautifulsoup”没有报错的话，则说明安装成功，否则，将报类似错误如下：
代码如下:
traceback (most recent call last):
  file , line 1, in
importerror: no module named bs4