def METHOD_NAME(self):
    self.assertEqual('1 + 2 = 3', f'1 + 2 = {1+2}')
    self.assertEqual("'hello'", F'{"hello"!r}')
    self.assertEqual("hi{there}", f"hi{{{'there'}}}")
    import datetime
    d = datetime.datetime(2010, 7, 4, 12, 15, 58)
    self.assertEqual('2010-07-04 12:15:58', f'{d:%Y-%m-%d %H:%M:%S}')
    # Make sure we can format multiple objects next to each other (bug regression)
    self.assertEqual('2010-07-04 12:15:58 TIME', f'{d:%Y-%m-%d %H:%M:%S} {"TIME"}')
    class Dummy:
        def __format__(self, fmtstring):
            return fmtstring
    x = Dummy()
    self.assertEqual('hello world!', f'hello {x:world}!')
    self.assertEqual('hello world!!', f'{x:hello {x:world}!}!')