[Python] Converting unicode string to hexadecimal representation

I want to convert unicode string to its hexadecimal representation. For example, u'\u041a\u0418\u0421\u0410' should be converted to "\xD0\x9A\xD0\x98\xD0\xA1\xD0\x90". I tried the code below (python 2.7):

unicode_username.encode("utf-8").encode("hex")


However, I get a string:

'd09ad098d0a1d090'


Any suggestions how I can get \xD0\x9A\xD0\x98\xD0\xA1\xD0\x90?

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