从python脚本设置bash变量 [英] set bash variable from python script

问题描述

我正在bash脚本中调用一个python脚本，我想知道是否有一种简单的方法可以在我的python脚本中设置bash变量.

i'm calling a python script inside my bash script and I was wondering if there is a simple way to set my bash variables within my python script.

示例:

我的bash脚本:

#!/bin/bash

someVar=""
python3 /some/folder/pythonScript.py

我的python脚本:

My python script:

anotherVar="HelloWorld"

是否可以将someVar设置为anotherVar的值?我当时想在python脚本中的文件中打印属性，然后从我的bash脚本中读取它们，但是也许还有另一种方法.我也不知道，也不认为这有什么区别，但是我可以用相同的名称(someVar/someVar而不是someVar/anotherVar)来命名两个变量.

Is there a way I can set my someVar to the value of anotherVar? I was thinking of printing properties in a file inside the python script and then read them from my bash script but maybe there is another way. Also I don't know and don't think it makes any difference but I can name both variable with the same name (someVar/someVar instead of someVar/anotherVar)

推荐答案

不，当您执行python时，您将启动一个新进程，并且每个进程只能对其自己的内存进行 访问.想象一下，如果一个进程可能影响另一个进程的内存，将会发生什么！即使对于这样的父/子进程，这也将是一个巨大的安全问题.

No, when you execute python, you start a new process, and every process has access only to their own memory. Imagine what would happen if a process could influence another processes memory! Even for parent/child processes like this, this would be a huge security problem.

您可以制作python print()并使用它，

You can make python print() something and use that, though:

#!/usr/bin/env python3

print('Hello!')

在您的shell脚本中:

And in your shell script:

#!/usr/bin/env bash

someVar=$(python3 myscript.py)
echo "$someVar"

当然，您可以使用许多其他IPC技术，例如套接字，管道，共享内存等.但是如果没有上下文，很难提出具体的建议.

There are, of course, many others IPC techniques you could use, such as sockets, pipes, shared memory, etc... But without context, it's difficult to make a specific recommendation.

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