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  1. nums = [5, 12, 7, 9, 21, 7, 14]
  2. # 统计数字7出现的次数
  3. count_seven = nums.count(7)
  4. print("数字7出现的次数：",count_seven)
  5. # 判断99是否存在，不存在则添加
  6. if 99 not in nums:
  7.     nums.append(99)
  8. print("添加99后的列表：",nums)# your code goes here
Success #stdin #stdout 0.07s 14052KB
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Standard input is empty
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数字7出现的次数： 2
添加99后的列表： [5, 12, 7, 9, 21, 7, 14, 99]
https://ideone.com/Na9nYY
language:
Python 3 (python  3.12)
created:
3 days ago
visibility:
public

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