python判断字符串是会否包含中文

这个方法输出结果是正确的

def is_Chinese(text):
    zhPattern = re.compile(u'[u4e00-u9fa5]+')
    for ch in text:
        match = zhPattern.search(ch)
        if(match):
            return True
    return False

text = "中文"
text = text.decode('utf-8')
if(is_Chinese(text)):
    print("有中文")

这个方法输出结果不对

def is_Chinese(word):
    for ch in word:
        if 'u4e00' <= ch <= 'u9fff':
            return True
    return False

text = "中文"
text = text.decode('utf-8')
print(is_Chinese(text))