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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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package org.python.antlr.adapter;

import java.util.ArrayList;
import java.util.List;

import org.python.antlr.base.stmt;
import org.python.core.Py;
import org.python.core.PyObject;

public class StmtAdapter implements AstAdapter {

    public Object py2ast(PyObject o) {
        if (o instanceof stmt) {
            return o;
        }
        return null;
    }

    public PyObject ast2py(Object o) {
        if (o == null) {
            return Py.None;
        }
        return (PyObject)o;
    }

    public List iter2ast(PyObject iter) {
        List stmts = new ArrayList();
        if (iter != Py.None) {
            for(Object o : (Iterable)iter) {
                stmts.add((stmt)py2ast((PyObject)o));
            }
        }
        return stmts;
    }
}