java - 导入模块错误: calling python script using jython in a java program

Question

我正在尝试在 java 程序中使用 jython 从 netbeans 执行 python 文件。我的代码是这样的:

PythonInterpreter.initialize(System.getProperties(), System.getProperties(), 
                             new String[0]);
PythonInterpreter interp = new PythonInterpreter();
interp.execfile("as1.py");

错误是:

Traceback (most recent call last):
  File "as1.py", line 2, in <module>
    import datetime
ImportError: No module named datetime

并且相互依赖的 python 文件也没有导入它们在同一目录中。

喜欢:

PythonInterpreter.initialize(System.getProperties(), System.getProperties(), new String[0]);
PythonInterpreter interp = new PythonInterpreter();
interp.execfile("calen.py");

python 文件是:

日历.py:

from as1 import * 
print ( "I am printing" + str(Moh(1000).run()))

as1.py:

from time import time
import datetime
class Moh:
    def __init__(self, n):  
        self.n = n

    def run(self):
        data = [1,2,3,4,5]
        start = time()
        for i in range(self.n):
            data.append(i)
        end = time()
        return ( end - start )/self.n

if __name__ == "__main__":
    print ( "I am printing" + str(Moh(1000).run()))

错误是:

Traceback (most recent call last):
  File "calen.py", line 1, in <module>
    from as1 import * 
ImportError: No module named as1

Answer 1

必须为 PythonInterpreter 设置“python.path”，这样它才能加载您的 as1 模块。为此，您必须以这种方式初始化 PythonInterpreter:

Properties properties = System.getProperties();
properties.put("python.path", PATH_TO_PARENT_DIRECTORY_OF_AS1_PY);
PythonInterpreter.initialize(System.getProperties(), properties, new String[0]);
PythonInterpreter interp = new PythonInterpreter();
interp.execfile("calen.py");