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db: added set_default method which will set a default value to a spec… #14

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db: added set_default method which will set a default value to a spec… #14

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13 changes: 13 additions & 0 deletions semidbm/db.py
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Original file line number Diff line number Diff line change
Expand Up @@ -166,6 +166,19 @@ def keys(self):

def values(self):
return [self[key] for key in self._index]

def set_default(self, key, default_value):
"""
If the key already exists in the items dictionary, the value
will be returned in the dictionary; else the value will be added
to the dictionary and the default_value will be returned.
"""

if key in self:
return self[key]

self[key] = default_value
return default_value

def close(self, compact=False):
"""Close the db.
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