python 統計特定元素個數

代碼:

import random
a=[random .randint (0,51) for i in range(1000)]
from collections import Counter
count=Counter(a)
print(count)

輸出:

Counter({44: 31, 19: 27, 49: 26, 13: 26, 35: 25, 5: 24, 38: 24, 47: 24, 34: 23, 2: 23, 51: 22, 46: 22, 10: 21, 50: 21, 6: 21, 43: 21, 4: 20, 30: 20, 37: 20, 26: 20, 21: 20, 15: 20, 27: 20, 33: 20, 25: 20, 12: 19, 23: 19, 39: 19, 31: 19, 40: 18, 16: 18, 11: 18, 17: 18, 45: 18, 42: 18, 48: 18, 9: 18, 0: 17, 36: 17, 1: 17, 18: 17, 29: 17, 14: 17, 41: 17, 7: 16, 20: 15, 22: 14, 28: 14, 24: 11, 8: 11, 32: 11, 3: 8})

注: 輸出爲字典形式

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