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Multiple Interpreters

Метки: python

It’s also worth noting that you can have multiple PythonInterpreter objects in a program, and each one has its own name space:

// Jython/MultipleJythons.java
// You can run multiple interpreters, each
// with its own name space.
import org.python.util.PythonInterpreter;
import org.python.core.*;

public class MultipleJythons {
  public static void
  main(String[] args) throws PyException  {
    PythonInterpreter
      interp1 =  new PythonInterpreter(),
      interp2 =  new PythonInterpreter();
    interp1.set("a", new PyInteger(42));
    interp2.set("a", new PyInteger(47));
    interp1.exec("print(a)");
    interp2.exec("print(a)");
    PyObject x1 = interp1.get("a");
    PyObject x2 = interp2.get("a");
    System.out.println("a from interp1: " + x1);
    System.out.println("a from interp2: " + x2);
  }
}

When you run the program you’ll see that the value of a is distinct within each PythonInterpreter.