将字符转换为其python转义序列 [英] Converting characters to their python escape sequences

问题描述

是否可以采用字符串并将所有个字符转换为它们的Python转义序列？

Is it possible to take a string, and convert all the characters into their Python escape sequences?

推荐答案

同时支持 str 和 unicode 的全转义（现在产生最短的转义序列）：

Supports full escaping of both str and unicode (now produces the shortest escape sequence):

def escape(s):
    ch = (ord(c) for c in s)
    return ''.join(('\\x%02x' % c) if c <= 255 else ('\\u%04x' % c) for c in ch)

for text in (u'\u2018\u2019hello there\u201c\u201d', 'hello there'):
    esc = escape(text)
    print esc

    # code below is to verify by round-tripping
    import ast
    assert text == ast.literal_eval('u"' + esc + '"')

输出：

\u2018\u2019\x68\x65\x6c\x6c\x6f\x20\x74\x68\x65\x72\x65\u201c\u201d
\x68\x65\x6c\x6c\x6f\x20\x74\x68\x65\x72\x65

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