The Problem of Object Exports in Large JavaScript Codebases

[JoeanAmier]

import pythonmonkey as pm

js_code = """
function a(str) {
    return b(str);
}
function b(str) {
    return c(str);
}
function c(str) {
    return str;
}
"""

hello = pm.eval(js_code + ";a")
print(hello("1751802131000"))

For example, I have JavaScript code containing multiple interdependent functions, and I need to export several functions for use. Passing the entire JS code each time just to export a single function feels inelegant. Is there a more elegant implementation approach?

[zollqir]

There are many ways to do this. If you want to do this in a single file, the simplest would be to put those functions in a container, like a list or object.

import pythonmonkey as pm

function_object = pm.eval("""() => {
  function a(str) {
    return b(str);
  }
  function b(str) {
    return c(str);
  }
  function c(str) {
    return str;
  }
  
  return {a, b, c};
}""")()
print(function_object.a("1751802131000"))
print(function_object.b("1751802131000"))
print(function_object.c("1751802131000"))

Alternatively, if you're willing to use multiple files, you can make a CommonJS module that you export the functions from.

definitions.js:

function a(str) {
  return b(str);
}
function b(str) {
  return c(str);
}
function c(str) {
  return str;
}

module.exports = { a, b, c }

main.py

import pythonmonkey as pm

a, b, c = pm.require("./definitions").values()
print(a("1751802131000"))
print(b("1751802131000"))
print(c("1751802131000"))

[JoeanAmier]

Thank you for your guidance!