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34 lines
853 B
Python
34 lines
853 B
Python
#!/usr/bin/python3
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# mari von steinkirch @2013
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# steinkirch at gmail
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from collections import Counter
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def Counter_example():
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''' show some examples for Counter '''
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''' it is a dictionary that maps the items to the number of occurences '''
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seq1 = [1, 2, 3, 5, 1, 2, 5, 5, 2, 5, 1, 4]
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seq_counts = Counter(seq1)
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print(seq_counts)
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''' we can increment manually or use the update() method '''
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seq2 = [1, 2, 3]
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seq_counts.update(seq2)
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print(seq_counts)
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seq3 = [1, 4, 3]
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for key in seq3:
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seq_counts[key] += 1
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print(seq_counts)
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''' also, we can use set operations such as a-b or a+b '''
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seq_counts_2 = Counter(seq3)
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print(seq_counts_2)
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print(seq_counts + seq_counts_2)
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print(seq_counts - seq_counts_2)
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if __name__ == '__main__':
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Counter_example()
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