今天在使用 Jython 调用 Python 脚本的时候出现了异常：
Exception in thread "main" ImportError: Cannot import site module and its dependencies: No module named site
Determine if the following attributes are correct:
* sys.path: ['/Users/dongguabai/develope/maven/repository/org/python/jython/2.7.0/Lib', '__classpath__', '__pyclasspath__/']
This attribute might be including the wrong directories, such as from CPython
* sys.prefix: /Users/dongguabai/develope/maven/repository/org/python/jython/2.7.0
This attribute is set by the system property python.home, although it can
be often automatically determined by the location of the Jython jar file
You can use the -S option or python.import.site=false to not import the site module
使用的是 Jython，依赖：
<dependency>
<groupId>org.python</groupId>
<artifactId>jython</artifactId>
<version>2.7.0</version>
</dependency>
调用方法：
public class Test {
public static void main(String[] args) throws IOException {
String path = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX + "py/test.py").getPath();
PythonInterpreter interpreter = new PythonInterpreter();
interpreter.execfile(path);
PyFunction function = interpreter.get("my_test",PyFunction.class);
PyObject pyobject = function.__call__(new PyString("huzhiwei"),new PyString("25"));
System.out.println("anwser = " + pyobject.toString());
}
}解决方案：
调用方法修改增加上面几行：
public class Test {
public static void main(String[] args) throws IOException {
Properties props = new Properties();
props.put("python.home", "path to the Lib folder");
props.put("python.console.encoding", "UTF-8");
props.put("python.security.respectJavaAccessibility", "false");
props.put("python.import.site", "false");
Properties preprops = System.getProperties();
PythonInterpreter.initialize(preprops, props, new String[0]);
String path = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX + "py/test.py").getPath();
PythonInterpreter interpreter = new PythonInterpreter();
interpreter.execfile(path);
PyFunction function = interpreter.get("my_test",PyFunction.class);
PyObject pyobject = function.__call__(new PyString("huzhiwei"),new PyString("25"));
System.out.println("anwser = " + pyobject.toString());
}
}或者将依赖修改为：
<dependency>
<groupId>org.python</groupId>
<artifactId>jython-standalone</artifactId>
<version>2.7.1</version>
</dependency>
References：
https://www.jianshu.com/p/cefdaccd3fd3
https://bugs.jython.org/issue2355
