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- #class Expression(object):
- # """Class used to hold a mathematical expression."""
- #
- # magic_operator_map = {
- # int.__add__: '%s + %s',
- # int.__sub__: '%s - %s',
- # int.__mul__: '%s * %s',
- # int.__div__: '%s / %s',
- # int.__neg__: '-%s',
- # int.__pow__: '%s**%s',
- # }
- #
- # def __init__(self, operator, *args):
- # super(Expression, self).__init__()
- # self.operator, self.args = args[0], args[1:]
- #
- # def __str__(self):
- # return self.magic_operator_map[self.operator] % self.args
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