python：删除unicode字符

Question

import sys
import nltk
import unicodedata
import pymongo
conn = pymongo.Connection('mongodb://localhost:27017')

 def jd_extract():
    try:
        iter = collection.find({},limit=1)
        for item in iter:
             return (item['jd'])


res=jd_extract()
print res

prints

[u'Software Engineer II', , u' ', , u' ', , u' ', Skills: C#,WPF,SQL , u' ', , u' ', Experience: 3-4.5 Yrs , u' ', , u' ', Job Location:- Gurgaon/Noida , u' ', , u' ', Job Summary: , u' ', The Software Engineer II's role is to develop and manage the application code for a system or part of a project. The Software Engineer II role typically has skills to work with multiple platforms and/or services. , u' ',   , u' ',   , u' \xa0',  , u' ', , u' ', ][u' ', Salary: , u'\n', Not Disclosed by Recruiter , u'\n', , u'\n'][u' ', Industry: , u'\n', IT-Software / Software Services , u'\n', , u'\n'][u' ', Functional Area: , u'\n', IT Software - Application Programming, Maintenance , u'\n', , u'\n'][u' ', Role Category: , u'\n', Programming & Design , u'\n', , u'\n'][u' ', Role: , u'\n', Software Developer , u'\n', , u'\n'][u' ', Keyskills: , u'\n', wpf C# Sql Programming , u'\n', , u'\n'][u' ', Education: , u'\n', 
    UG - Any Graduate - Any Specialization, Graduation Not Required    
     PG - Any Postgraduate - Any Specialization, Post Graduation Not Required     
     Doctorate - Any Doctorate - Any Specialization, Doctorate Not Required      , u'\n', , u'\n']

I want to remove unicode characters from res. I tried str(res) but not working.

Answer 1

try to encode the unicode strings as 'utf-8'

res =[s.encode('utf-8') for s in res]

or if you prefer for loops

ascii_strings = []
for s in res:
   ascii_strings.append(s.encode('utf-8'))

Answer 2

As I understand, you want to remove u'' when you print res (a list of Unicode strings). You could print each string individually:

for unicode_string in res:
    print unicode_string

The reason you saw u'' is due to print some_list calling repr(item) on each item in the list and u'..' is Unicode string literal in Python:

>>> print [u'a']
[u'a']
>>> print repr(u'a')
u'a'
>>> print u'a'
a

Answer 3

List of str, unicode and int types

>>> item_list = [ 'a', 3, u'b', 5, u'c', 8, 'd', 13, 'e' ]
>>> print item_list
['a', 3, u'b', 5, u'c', 8, 'd', 13, 'e']

Convert unicode types to str types

>>> item_list = [ str(item) if isinstance(item, unicode) else item for item in item_list  ]
>>> print item_list
['a', 3, 'b', 5, 'c', 8, 'd', 13, 'e']

Convert str types to unicode types

>>> item_list = [ unicode(item) if isinstance(item, str) else item for item in item_list  ]
>>> print item_list
[u'a', 3, u'b', 5, u'c', 8, u'd', 13, u'e']

str and unicode are both subclasses of basestring