Add custom button on form toolbar and link with a python def

Hello, I need to create a new button on toolbar… So I do these:

    frm.add_custom_button(__('test Button'), function () {
       console.log( 'test') ;
    });

But instead of console.logI need to execute a def function inside my doctype.py file… how can i do that?

regards

Have you tried frappe.call function?

Here’s an example:

I tried but not work for me… probablybecause I`m not using correctly…

In my doctype.py i have these:

file: contaareceber.py

    def btn_run_pgto(self):
            frappe.msgprint("Im here")

file: contaareceber.js

if (!doc.__islocal && doc.status === 'Aberto') {
        cur_frm.add_custom_button('Efetuar Baixa', function () {
            frappe.confirm('Deseja realmente efetuar a Baixa de Registro?',
                function () {
                    frappe.call({
                        "method": "frappe.client.get",
                        args: {
                            doctype: "Conta a Receber",
                            name: "btn_run_pgto"
                        },
                        callback: function (data) {
                            frappe.show_alert('Baixa Efetuada com Sucesso');
                        }
                    })
                },
                function () {
                    window.close();
                }
            )
        }).addClass("btn-primary");
    }

Running the button, returns:
Conta a Receber btn_run_pgto not found

What I missing here?

Thanks!

found the solution

frappe.call({
                        doc: doc,
                        method: "btn_run_pgto",
                        callback: function (data) {
                            frappe.show_alert('Baixa Efetuada com Sucesso');
                        }
                    })
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