35 lines
844 B
Python
35 lines
844 B
Python
# BEGIN TOMBOLA_ABC
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import abc
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class Tombola(abc.ABC): # <1>
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@abc.abstractmethod
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def load(self, iterable): # <2>
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"""Add items from an iterable."""
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@abc.abstractmethod
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def pick(self): # <3>
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"""Remove item at random, returning it.
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This method should raise `LookupError` when the instance is empty.
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"""
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def loaded(self): # <4>
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"""Return `True` if there's at least 1 item, `False` otherwise."""
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return bool(self.inspect()) # <5>
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def inspect(self):
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"""Return a sorted tuple with the items currently inside."""
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items = []
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while True: # <6>
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try:
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items.append(self.pick())
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except LookupError:
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break
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self.load(items) # <7>
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return tuple(sorted(items))
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# END TOMBOLA_ABC
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