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  1. msg = "hello 123 WORLD"
  2. #统计长度和小写字母个数
  3. length =len(msg)
  4. lower_count = sum(1 for ch in msg if ch.islower())
  5. print("长度:",length)
  6. print("小写字母个数:", lower_count)
  7. #替换并转小写
  8. new_msg = msg.replace("WORLD", "Python")
  9. result = new_msg.lower()
  10. print("结果:",result)
Success #stdin #stdout 0.07s 14136KB
stdin
Standard input is empty
stdout
长度: 15
小写字母个数: 5
结果: hello 123 python