运行环境：Windows 8.1Python：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 mainstatus =self.run(options, args)
File"J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\commandsstall.py", line 278, in runrequirement_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",
ne1229,inprepare_files
req_to_install.run_egg_info()
File"J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\req.py",
ne292,inrun_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",
ne265,insetup_pyimportsetuptools
File"build\bdist.win-amd64\egg\setuptools\__init__.py", line 11,in<modulfromsetuptools.extensionimportExtension
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>classSimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
File"J:\Program Files (x86)\Python\Python27\lib\SimpleHTTPServer.py", line8,inSimpleHTTPRequestHandler
mimetypes.init()#try to read system mime.typesFile"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_registryforsubkeynameinenum_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: ordinnotinrange(128)
Storing debug logforfailureinC:\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：
ifsys.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
Python2.7.6 (default, Nov 10 2013, 19:24:24) [MSC v.1500 64 bit (AMD64)] on 32Type"help","copyright","credits"or"license"formore information.>>>frombs4importBeautifulSoup>>> exit()
如果“frombs4importBeautifulSoup”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
原文地址：曾是土木人转载请注明出处：http://www.cnblogs.com/hongfei/p/3763184.html