Converting characters to their python escape sequences

Question

是否可以获取字符串，并将所有字符转换为Python转义序列？

Answer 1

repr() escapes all the characters that need to be escaped

repr(string)

There are other methods in the standard library for the likes of escaping URIs and so on

Answer 2

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 + '"')

Output:

\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