python unicode-safe __repr__ pattern

unicode_safe_repr.py

# This is a pattern I like but I always forget the details

class Boo(object):
     def __init__(self):
         self.foo = u"☃"
        
     def __unicode__(self):
         return u"Boo(foo={})".format(self.foo)
      
     def __str__(self):
         return self.__unicode__().encode('utf-8')
      
     __repr__ = __str__