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October 13, 2015 23:57
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Create a dictionary of counters that defaults to 0 with defaultdict
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| from collections import defaultdict | |
| counters = defaultdict(int) | |
| counters['foo'] += 1 | |
| counters['foo'] | |
| # Out: 1 | |
| counters['bar'] | |
| # Out: 0 |
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