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  1. from collections import Counter
  2. import random
  3. import timeit
  4.  
  5.  
  6. data = [random.randint(0, 9) for _ in range(1000)]
  7.  
  8.  
  9. def ex1():
  10.     c = Counter(data)
  11.     return [i for i in data if c[i] > 1]
  12.  
  13.  
  14. def ex2():
  15.     return [i for i in data if data.count(i) > 1]
  16.  
  17.  
  18. if __name__ == '__main__':
  19.     print('ex1', timeit.timeit(ex1, number=30))
  20.     print('ex2', timeit.timeit(ex2, number=30))
  21.  
Success #stdin #stdout 2.74s 45728KB
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stdin
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Standard input is empty
stdout
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('ex1', 0.02121281623840332)
('ex2', 2.7007179260253906)
https://ideone.com/u93NvY
language:
Python (PyPy 2.7.13)
created:
8 years ago
visibility:
public

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