Fix ability to run compiled scripts in python 3.

Fixes #77

src/jep/pyembed.c

@@ -1351,6 +1351,11 @@ static void pyembed_run_pyc(JepThread *jepThread,
         return;
     }
     (void) PyMarshal_ReadLongFromFile(fp);
+#if PY_MAJOR_VERSION >= 3
+    // Python 3.3 added an extra long containing the size of the source.
+    // https://github.com/python/cpython/commit/5136ac0ca21a05691978df8d0650f902c8ca3463
+    (void) PyMarshal_ReadLongFromFile(fp);
+#endif
     v = (PyObject *) (intptr_t) PyMarshal_ReadLastObjectFromFile(fp);
     if (v == NULL || !PyCode_Check(v)) {
         Py_XDECREF(v);

src/jep/test/TestCompiledScript.java

@@ -0,0 +1,34 @@
+package jep.test;
+
+import java.lang.IllegalStateException;
+import java.lang.Boolean;
+
+import jep.Jep;
+import jep.JepConfig;
+import jep.JepException;
+
+/**
+ * Tests that a compiled script can be loaded by Jep.runscript()
+ * 
+ * Created: May 2017
+ * 
+ * @author Ben Steffensmeier
+ */
+public class TestCompiledScript {
+
+    public static void main(String[] args) throws JepException{
+        JepConfig config = new JepConfig();
+        config.addIncludePaths(".");
+        Jep jep = new Jep(config);
+        jep.eval("import py_compile");
+        jep.eval("py_compile.compile(file='build/testScript.py', cfile='build/testScript.pyc')");
+        jep.eval(null);
+        jep.runScript("build/testScript.pyc");
+        Object result = jep.getValue("isGood()");
+        jep.close();
+        if(!Boolean.TRUE.equals(result)){
+            throw new IllegalStateException("isGood() returned " + result);
+        }
+    }
+
+}

tests/test_run_script.py

@@ -0,0 +1,26 @@
+import unittest
+import os
+import os.path
+
+from tests.jep_pipe import jep_pipe
+from tests.jep_pipe import build_java_process_cmd
+
+
+class TestRunScript(unittest.TestCase):
+
+    def setUp(self):
+        with open('build/testScript.py', 'w') as testScript:
+            testScript.write("def isGood():\n")
+            testScript.write("    return True\n")
+
+
+    def test_compiledScript(self):
+        jep_pipe(build_java_process_cmd('jep.test.TestCompiledScript'))
+
+
+    def tearDown(self):
+        if os.path.exists('build/testScript.py'):
+            os.remove('build/testScript.py')
+        if os.path.exists('build/testScript.pyc'):
+            os.remove('build/testScript.pyc')
+