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Adds len() to relation

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Returns the cardinality
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Salvo 'LtWorf' Tomaselli 2015-06-05 18:28:44 +02:00
parent d05c2e2d3c
commit 01dc9391d1
1 changed files with 3 additions and 0 deletions
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relational/relation.py
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@ -382,6 +382,9 @@ class relation (object):
# comparing content # comparing content
return self.content == other.content return self.content == other.content
def __len__(self):
return len(self.content)
def __str__(self): def __str__(self):
'''Returns a string representation of the relation, can be printed with '''Returns a string representation of the relation, can be printed with
monospaced fonts''' monospaced fonts'''