【python】python判斷句子是否含有中文 utf-8

#coding=utf-8

def is_chinese(text):
    for c in text:
        """判斷一個unicode是否是漢字"""
        if c >= u'\u4e00' and c <= u'\u9fa5':
            return True
    return False

a=u'dsfa'
b=u'sdf士大夫'
print(is_chinese(a))
print(is_chinese(b))