Python Unicode Conversions

Question

How to do the following conversions in Python?

"杭州" to "%BA%BC%D6%DD"
"大连" to "%B4%F3%C1%AC"

Answer 1

To convert u'杭州' to '%BA%BC%D6%DD':

In [24]: ''.join('%{0:X}'.format(ord(c)) for c in u"杭州".encode('gbk'))
Out[24]: '%BA%BC%D6%DD'
In [25]: ''.join('%{0:X}'.format(ord(c)) for c in u"大连".encode('gbk'))
Out[25]: '%B4%F3%C1%AC'

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To convert '%BA%BC%D6%DD' to u'杭州':

In [54]: import binascii 
In [55]: print(binascii.unhexlify(''.join('%BA%BC%D6%DD'.split('%'))).decode('gbk'))
杭州

• jack: thanks for your answer. it works. could you please teach me how to convert strings like '%BA%BC%D6%DD' back to u"杭州"?
• unutbu: @jack: I've added a way to convert '%BA%BC%D6%DD' back to u"杭州". Note however that Dietrich Epp provided a better answer (using urllib.parse.quote and/or urllib.parse.unquote) if your Python version is modern enough (e.g. Python3).

Answer 2

You'll need to give us more information.

def encode(s):
 if s == "杭州":
 return "%BA%BC%D6%DD"
 if s == "大连":
 return "%B4%F3%C1%AC"
 raise ValueError

You need to tell us the encoding you're using, for one thing.

import urllib.parse
def encode(s):
 return urllib.parse.quote(s.encode('gbk'))