java regex flavor in python

Question

I am python programmer and always played regular expressions in python but recently I have been asked to use java flavor regular expression, does mean I have to write application in java. So just checking is there a way to use java regex in python? Thanks

Regex does differ a bit across languages, but the core functions remain the same. For more details stackoverflow.com/a/10492382/4983469 — leoOrion
– leoOrion, Commented Aug 3, 2021 at 12:40
Thanks for the checking. Yes I know different across the languages but how do I get java flavor in python? — DataNoob
– DataNoob, Commented Aug 3, 2021 at 12:59
No point of adding negative mark on a valid question. I have already looked at the link and it does not work for my regex. Example I have look behind regex (?:(?<!.?[-:0-9\/] ?) the optional . and space does not work in python — DataNoob
– DataNoob, Commented Aug 3, 2021 at 13:32
No, not easily or directly. What would be the point? Can you speak Spanish in English? Maybe I am missing the point. — user11844224
– user11844224, Commented Aug 4, 2021 at 0:59

DataNoob · Accepted Answer · 2021-08-08 22:22:25Z

0

https://www.py4j.org

Below java program need to be run first

import py4j.GatewayServer;

public class AdditionApplication {

  public int addition(int first, int second) {
    return first + second;
  }

  public static void main(String[] args) {
    AdditionApplication app = new AdditionApplication();
    // app is now the gateway.entry_point
    GatewayServer server = new GatewayServer(app);
    server.start();
  }
}

Below is the way to access java addition method in python

from py4j.java_gateway import JavaGateway
gateway = JavaGateway()
gateway.entry_point.addition(10, 10)

answered Aug 8, 2021 at 22:22

DataNoob

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2 Comments

user11844224 Over a year ago

Per, py4j.org, the port #s used are 25332-25334, but per iana.org/assignments/service-names-port-numbers/…, those port # are unassigned.

DataNoob Over a year ago

They may not be but default ports. These ports can be changed py4j.org/py4j_java_gateway.html#module-py4j.java_gateway

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