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20 lines
819 B
Python
20 lines
819 B
Python
class uniquelist(list):
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''' A list whose every value is unique.
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uniquelist.append(val) or __setitem__(pos,val) i.e. uniquelist[pos]=val is ignored if val is already in uniquelist.
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Returns True if the value is added, else returns False. '''
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def __setitem__(self,pos,val):
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if val not in self:
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super(uniquelist,self).__setitem__(pos,val)
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return True
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else:
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return False
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def append(self,val):
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if val not in self:
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super(uniquelist,self).append(val)
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return True
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else:
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return False
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def extend(self,iterable):
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for temp in iterable: # todo: use yield so that it is not copied into memory
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self.append(temp)
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# Todo: Allow for type checking by allowing a type_of_members to be set |