python中如何去掉unicode编码前面的u?

1.列表类型（用join方法）

myUlist = [u'AB', u'AB', u'AB', u'AB']
print myUlist
print ", ".join(myUlist)

2.字典类型

[{u'sum(id)': Decimal('28'), u'month': 3}, {u'sum(id)': Decimal('1'), u'month': 12}]
from unicode import ToUnicode
li = []
for item in ret:
    print item
    dic = {}
    for key, value in item.items():
        # 借助于单个字符串的方法
        dic[ToUnicode(key)] = value
    li.append(dic)
print li

3.单个字符串

def ToUnicode(s):
    try:
        s = str(s.decode("GBK").encode("utf-8"))
    except:
        s1 = ''
        s2 = ''
        L = []
        s2 = str(list(s.decode('GBK')))
        s2 = s2.replace("u'", "'")
        s2 = s2.replace("\\", "%")
        L = eval(s2)

        for e in L:
            s1 += e
        s = s1.encode("utf-8")
    return s