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Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

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// Copyright (c) Corporation for National Research Initiatives
package org.python.core;

import java.util.List;

import org.python.util.Generic;

public class PyCompoundCallable extends PyObject {

    private List callables = Generic.list();

    private PySystemState systemState = Py.getSystemState();

    public void append(PyObject callable) {
        callables.add(callable);
    }

    public void clear() {
        callables.clear();
    }

    public PyObject __call__(PyObject[] args, String[] keywords) {
        // Set the system state to handle callbacks from java threads
        Py.setSystemState(systemState);
        for (PyObject callable : callables) {
            callable.__call__(args, keywords);
        }
        return Py.None;
    }

    public String toString() {
        return "";
    }
}