如何从Python执行JavaScript代码？ [英] How can I execute JavaScript code from Python?

问题描述

假设我在JavaScript文件中包含此代码：

Lets say that I have this code inside a JavaScript file:

var x = 10;
x = 10 - 5;
console.log(x);
function greet() {
  console.log("Hello World!");
}
greet()

我如何使用Python执行此代码和打印 x 和 Hello World！？

这是一些伪代码，进一步解释了我的想法：

How would I use Python to execute this code and "print" x and Hello World!?
Here is some pseudo code that further explains what I'm thinking:

# 1. open the script
script = open("/path/to/js/files.js", "r")
# 2. get the script content
script_content = script.read()
# 3. close the script file
script.close()
# 4. execute the script content and "print" "x" and "Hello World!"
x = js.exec(script_content)

并且，预期结果如下所示：

And, the expected result would look like this:

>>> 5
>>> "Hello World!"

推荐答案

模块 Naked 正是这样做的。 pip install Naked （或者如果您愿意，可以从源代码安装）并导入库shell函数，如下所示：

The module Naked does exactly this. pip install Naked (or install from source if you prefer) and import the library shell functions as follows:

from Naked.toolshed.shell import execute_js, muterun_js

response = muterun_js('file.js')
if response.exitcode == 0:
  print(response.stdout)
else:
  sys.stderr.write(response.stderr)

对于您的特定情况，将file.js作为

For your particular case, with file.js as

var x = 10;
x = 10 - 5;
console.log(x);
function greet() {
      console.log("Hello World!");
}
greet()

输出 '5 \\\
Hello World！\ n'，您可以根据需要进行解析。

the output is '5\nHello World!\n', which you can parse as desired.

这篇关于如何从Python执行JavaScript代码？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！