Given an integer in python return bytes 2-7 and translating java code

huangapple
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英文:

Given an integer in python return bytes 2-7 and translating java code

问题

  1. # Python 3 code equivalent to the provided Java code
  3. def get_timestamp(tracking_id):
  4.     return tracking_id & 0xFFFFFFFFFFFF
  6. def get_counter(tracking_id):
  7.     return (tracking_id >> 48) & 0xFFFF
  9. # Given tracking ID
  10. tracking_id = 24305955239911
  12. # Getting timestamp and counter
  13. timestamp = get_timestamp(tracking_id)
  14. counter = get_counter(tracking_id)
  16. print("Timestamp:", timestamp)
  17. print("Counter:", counter)

请注意，上述Python代码与提供的Java代码等效，用于从给定的tracking ID中提取时间戳和计数器信息。将提供的Java代码转换为Python代码，然后使用给定的tracking ID调用相应的函数以获取时间戳和计数器。

英文:

I am not a java dev nor a guru with dealing with bytes.

I am given this number:

trackingID = 24305955239911

I need to do the below:

  1.  bytes 0-1 = internal tracking number 
  2.  bytes 2-7 = Timestamp in nanoseconds from midnight

The java code for doing what is need is here:

  1. public class TrackingID {
  3.     /**
  4.      * Returns the timestamp from TrackingId.
  5.      * @param trackingId  - trackingId
  6.      * @return - java.lang.Long timestamp in nanoseconds from midnight
  7.      */
  8.     public static long getTimestamp( long trackingId ) {
  9.         return trackingId & 0xffffffffffffl;
  10.     }
  12.     /**
  13.      * Returns the counter from TrackingId.
  14.      * @param trackingId  - trackingId
  15.      * @return - java.lang.Short counter
  16.      */
  17.     public static short getCounter( long trackingId ) {
  19.         return (short)( trackingId >> 48 );
  20.     }
  21. }

How do I do that in python3? to get the timestamp and the counter?

Thanks

答案1

得分: 2

我只能假设你在处理Java常量0xffffffffffffl，你可以将其翻译为 int('ffffffffffff', 16)。类似这样：

  1. class tracking_id:
  2.     @staticmethod
  3.     def get_timestamp(v):
  4.         return v & int('ffffffffffff', 16)
  5.     
  6.     @staticmethod
  7.     def get_counter(v):
  8.         return v >> 48
  11. if __name__ == "__main__":
  12.     print(tracking_id.get_timestamp(24305955239911))
  13.     print(tracking_id.get_counter(24305955239911))
英文:

I can only assume you're struggling with the Java constant 0xffffffffffffl, you could translate that to int('ffffffffffff', 16). Something like,

  1. class tracking_id:
  2.     @staticmethod
  3.     def get_timestamp(v):
  4.         return v & int('ffffffffffff', 16)
  6.     @staticmethod
  7.     def get_counter(v):
  8.         return v >> 48
  11. if __name__ == "__main__":
  12.     print(tracking_id.get_timestamp(24305955239911))
  13.     print(tracking_id.get_counter(24305955239911))

huangapple
  • 本文由 发表于 2020年9月15日 09:44:58
  • 转载请务必保留本文链接：https://go.coder-hub.com/63893899.html
  • java
  • python-3.x
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