Python str() Unicode

uc=lambda s: ', '.join('U+' + hex(ord(x))[2:].upper() for x in s)  # uc for unicode
uc('')
''
uc('a')
'U+61'
uc('ab')
'U+61, U+62'
uc('abc🐉🌄🌇👋')
'U+61, U+62, U+63, U+1F409, U+1F304, U+1F307, U+1F44B'
str.uc=uc  # TypeError: cannot set 'uc' attribute of immutable type 'str'