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var es = document.querySelectorAll('button[value="Undo"]');
function doo(){
    for (var ei=0; ei < es.length; ei++){
        var e = es[ei];
        e.click();
        var btnoks = document.querySelectorAll('button[value="Ok"]')
        if (btnoks.length > 0){
            btnoks[0].click();
        }
        if (ei == es.length - 1){

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test

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(function (interval_min, url){
    // Constants
    var CONTAINER_TOP_OFFSET = 30;
    var CONTAINER_MARGIN = 20,
        CONTAINER_PADDING = 10,
        BUTTON_CONTAINER_HEIGHT = 30;
    // Due to cross origin policy some site will not allow iframing - so we will create an iframe inside the same page.
    var body_info = {width: screen.availWidth, height: screen.availHeight }; // document.body.getBoundingClientRect();//document.getElementsByTagName("body")[0].getBoundingClientRect();
    var body_width = body_info.width - (CONTAINER_MARGIN * 2) - (CONTAINER_PADDING * 2) - 20,
        body_height = body_info.height - (CONTAINER_MARGIN * 2) - (CONTAINER_PADDING * 2) - CONTAINER_TOP_OFFSET - BUTTON_CONTAINER_HEIGHT - 20 - 50;

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---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-91-b6f524c4a765> in <module>()
----> 1 class Accountant(metaclass=CompanyMETA):
      2     name = ""
      3     salary = 150000.00
      4 

<ipython-input-90-01e64576f9dc> in __new__(cls, name, parents, dct)
     11                 else:

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class Accountant(metaclass=CompanyMETA):
    name = ""
    salary = 150000.00
    

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class Developer(metaclass=CompanyMETA):
    name = ""
    salary = 250000

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class CompanyMETA(type):
    @classmethod
    def __prepare__(cls, name, parents, **kwargs):
        return {}
    def __new__(cls, name, parents, dct):
        for attr, value in dct.items():
            if not attr.startswith("__"):
                if callable(value):
                    if not attr.startswith("c_"):
                        raise TypeError("You cannot define a method that starts with something other than 'c_'")

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class MyMeta(type):

    @classmethod
    def __prepare__(cls, name, parents, **kwargs):
        print("I am __prepare__ and I am being called. I must return a dictionary or dictionary like object to be used as namespace for the class")
        return {}

    def __new__(cls, name, parents, dct):
        print("I am a class and I am beign created by MyMeta.__new__")
        return super(MyMeta, cls).__new__(cls, name, parents, dct)

SabujXi

class MyMeta(type):

    def __new__(cls, name, parents, dct):
        print("I am a class and I am beign created by MyMeta.__new__")
        return super(MyMeta, cls).__new__(cls, name, parents, dct)

    def __init__(cls, name, parents, dct):
        print("Hey I am initiating the class after creation with an useless variable")
        cls.useless_var = "Useless string"

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class MyMeta(type):

    def __new__(cls, name, parents, dct):
        print("I am a class and I am beign created by MyMeta.__new__")
        return super(MyMeta, cls).__new__(cls, name, parents, dct)


class MyClass(metaclass=MyMeta):
    pass