英文:
Failed to run Python script from Java using Intellij
问题
我正在尝试在Intellij IDEA中使用Java代码运行Python脚本：
String commandString = "python /home/.../mypythonscript.py arg1 arg2";
try {
Process process = Runtime.getRuntime().exec(commandString);
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
} catch(IOException e) {
System.out.println(e.getMessage());
}
这个Python脚本会输出一个字符串，在我从Ubuntu Linux终端运行时效果很好。然而，使用上述Java代码运行Python脚本会返回一个错误消息：
Failed to run Python Script: Cannot run program "python": error=2, No such file or directory.
文件路径是正确的（我在终端中运行Python脚本时使用的路径和参数与之前相同），而且我已经将脚本权限设置为777。在Intellij中，我还进入了“文件>设置>外观与行为>路径变量”，并添加了一个包含Python脚本的文件夹的路径（它位于Pycharm项目的文件夹中）。然而，我仍然在收到这个错误消息。
非常感谢您的帮助！
英文:
I'm attempting to run a Python script using Java code in Intellij IDEA:
String commandString = "python /home/.../mypythonscript.py arg1 arg2";
try {
Process process = Runtime.getRuntime().exec(commandString);
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
} catch(IOException e) {
System.out.println(e.getMessage());
The Python script outputs a single String, and works great when I run it from my Ubuntu Linux terminal. However, using the above Java to run the Python script returns an error message:
> Failed to run Python Script: Cannot run program "python": error=2, No such file or directory.
The file path is correct (the path and arguments I give are identical to what I used to run the Python script in the terminal), and I've set the script permissions to 777. In Intellij, I've also gone to File>Settings>Appearance & Behavior>Path Variables and added a path to the folder that contains the Python script (it's being held in a folder for Pycharm projects). However, I'm still getting the error.
Any help would be much appreciated!
答案1
得分: 0
我这位经验丰富的Java开发朋友没有账号，但他找出了问题，我会在这里发布解决方案，以供将来遇到类似问题的人参考：
脚本是用Python3编写的，但我使用的代码：
String commandString = "python /home/.../mypythonscript.py arg1 arg2";
是针对Python 2的。应该改为：
String commandString = "python3 /home/.../mypythonscript.py arg1 arg2";
英文:
A more experienced Java developer friend of mine who doesn't have an account figured out the problem, the solution to which I'm posting here for anyone encountering a similar issue in the future:
The script was written in Python3, but the code I used:
String commandString = "python /home/.../mypythonscript.py arg1 arg2";
is for Python 2. It should have been written:
String commandString = "python3 /home/.../mypythonscript.py arg1 arg2";
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