Python2.7 unicode encoding gbk error

最近因为需要用python抓取网页的信息，遇到了python中最头痛的字符编码问题。

伪Unicode字符串： u'\xe6\x97\xa0\xe7\xba\xbfWLAN\xef\xbc\x9a'

解决套路

方法一

In[2]: s = u'\xe6\x97\xa0\xe7\xba\xbfWLAN\xef\xbc\x9a'
In[3]:print s
æ— çº¿WLAN：
In[4]: s.encode('gbk', 'ignore')
Out[4]: 'WLAN'
In[5]: s.encode('gbk')
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda2\lib\site-packages\IPython\core\interactiveshell.py", line 2881, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "", line 1, in 
    s.encode('gbk')
UnicodeEncodeError: 'gbk' codec can't encode character u'\xe6' in position 0: illegal multibyte sequence
In[6]: import sys
In[7]: sys.getdefaultencoding()
Out[7]: 'ascii'
In[8]: reload(sys)
'sys' (built-in)>
In[9]: sys.setdefaultencoding('utf-8')
In[10]: s
Out[10]: u'\xe6\x97\xa0\xe7\xba\xbfWLAN\xef\xbc\x9a'
In[11]: s.encode('gbk', 'ignore')
Out[11]: 'WLAN'
In[12]: s.encode('gbk')
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda2\lib\site-packages\IPython\core\interactiveshell.py", line 2881, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "", line 1, in 
    s.encode('gbk')
UnicodeEncodeError: 'gbk' codec can't encode character u'\xe6' in position 0: illegal multibyte sequence
In[13]: ## 解决方案
In[14]: s
Out[14]: u'\xe6\x97\xa0\xe7\xba\xbfWLAN\xef\xbc\x9a'
In[15]: print s.encode('raw_unicode_escape')
无线WLAN：

方法二

In[2]: import sys
In[3]: sys.getdefaultencoding()
Out[3]: 'ascii'
In[4]: s= u'\xe6\x97\xa0\xe7\xba\xbfWLAN\xef\xbc\x9a'
In[5]: print s.encode('raw_unicode_escape')
无线WLAN：

参考

• python-raw-unicode