Greetings, everyone 
I have a doctype named Google Translator. Inside this doctype, I added a button field type named btn. Then, I program it to do a task using client side script:
frappe.ui.form.on(“Google Translator”, “btn”, function (frm) {});
And it worked fine.
My question here is, how to accomplish this task using Python (server side script) ?
In other words, what is the python equivalent code of the the above JS code?
Regards,
Write a python method (it could be whitelisted) and call the method from inside the js script on callback perform needed client tasks
I’m reading about frapp.call
Thank you
It works perfectly 
.js Code:
// Omar M Shehada
frappe.ui.form.on('Google Translator', {
refresh: function(frm) {
frm.set_intro('Enter a text -> Pick up a language to translate to -> Hit Do Translate! -------> **You need to be ONLINE**')
// Making edits on the css level
set_css(frm);
},
btn: function(frm) {
frm.call({
doc: frm.doc,
method: 'frm_call',
args: {
msg: 'Hallo!'
},
freeze: true,
freeze_message: __("Translating..."),
callback: function(r) {
frappe.msgprint(r.message)
}
});
}
});
// Making edits on the css level
function set_css(frm) {
document.querySelectorAll("[data-fieldname='text']")[1].style.color = '#202020'
document.querySelectorAll("[data-fieldname='text']")[1].style.fontWeight = 'bold'
document.querySelectorAll("[data-fieldname='text']")[1].style.background = '#12ff21'
}
.py Code:
import frappe
from frappe import _
from frappe.model.document import Document
from googletrans import Translator
class GoogleTranslator(Document):
# Keep in mind that this doctype needs to be connected to the Internet
@frappe.whitelist()
def frm_call(self, msg):
import time
time.sleep(0.5)
trans = Translator()
text = self.text
try:
out = trans.translate(text, dest=self.pick_a_lang[:2])
self.translated_text = out.text
except:
self.translated_text = 'It works. Try it!'
Result:
