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eyaltrabelsi/python-tricks_collection_3.py

Created July 6, 2019 05:08
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Python trick using default dictionaries
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python-tricks_collection_3.py
>>> import collections
>>> m = collections.defaultdict(int)
>>> m['a']
0
>>> m = collections.defaultdict(str)
>>> m['a']
''
>>> m['b'] += 'a'
>>> m['b']
'a'
>>> m = collections.defaultdict(lambda: '[default value]')
>>> m['a']
'[default value]'
>>> m['b']
'[default value]'
>>> m = collections.defaultdict(list)
>>> m['a']
[]
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