'Adds a list of KeyboardButton to the keyboard. This function does not consider row_width.
ReplyKeyboardMarkup#row("A")#row("B", "C")#to_json() outputs \'{keyboard: [["A"], ["B", "C"]]}\'
See https://core.telegram.org/bots/api#replykeyboardmarkup
:param args: strings
:return: self, to allow function chaining.'

def row(self, *args):

    btn_array = []
    for button in args:
        if util.is_string(button):
            btn_array.append({'text': button})
        else:
            btn_array.append(button.to_dic())
    self.keyboard.append(btn_array)
    return self
