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：
pip install beautifulsoup4
运行的时候，报错如下：
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 <modul
from setuptools.extension import Extension
File "build\bdist.win-amd64\egg\setuptools\extension.py", line 5, in <modul
File "build\bdist.win-amd64\egg\setuptools\dist.py", line 15, in <module>
File "build\bdist.win-amd64\egg\setuptools\compat.py", line 19, in <module>
File "J:\Program Files (x86)\Python\Python27\lib\SimpleHTTPServer.py", line
, in <module>
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
default_encoding = sys.getdefaultencoding()
改成：
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：
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：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named bs4
