python 2.7 : test if characters in a string are all Chinese characters

Question

下面的代码测试字符串中的字符是否都是汉字。它适用于 Python 3 但不适用于 Python 2.7。我如何在 Python 2.7 中执行此操作？

for ch in name:
    if ord(ch) < 0x4e00 or ord(ch) > 0x9fff:
        return False

Answer 1

#  byte str (you probably get from GAE)
In [1]: s = """Chinese (汉语/漢語 Hànyǔ or 中文 Zhōngwén) is a group of related
        language varieties, several of which are not mutually intelligible,"""

#  unicode str
In [2]: us = u"""Chinese (汉语/漢語 Hànyǔ or 中文 Zhōngwén) is a group of related
        language varieties, several of which are not mutually intelligible,"""

#  convert to unicode using str.decode('utf-8')    
In [3]: print ''.join(c for c in s.decode('utf-8') 
                   if u'\u4e00' <= c <= u'\u9fff')
汉语漢語中文

In [4]: print ''.join(c for c in us if u'\u4e00' <= c <= u'\u9fff')
汉语漢語中文

要确保所有字符都是中文，应该这样做:

all(u'\u4e00' <= c <= u'\u9fff' for c in name.decode('utf-8'))

在您的 Python 应用程序中，在内部使用 unicode - 提前解码和延迟编码 - 创建一个 unicode sandwich .