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Fix safe_father_of_first

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This commit is contained in:
Pavel 'LEdoian' Turinsky 2020-03-18 21:56:25 +01:00
parent 007774c81b
commit ab69ca3fe2
1 changed files with 5 additions and 1 deletions
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6
seminar/treelib.py
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@ -20,7 +20,11 @@ def safe_pred(node):
# A to samé pro .father_of_first
def safe_father_of_first(node):
return node.prev
first_brother = node
while safe_pred(first_brother) is not None:
first_brother = safe_pred(first_brother)
try:
return first_brother.father_of_first
except ObjectDoesNotExist:
return None