'QPushButton' object is not callable

import sys
import sqlite3
from PyQt5 import uic
from PyQt5.QtWidgets import QApplication, QMainWindow, QMessageBox, QListWidgetItem
 
 
class CoffEEE(QMainWindow):
    def __init__(self):
        super().__init__()
        uic.loadUi('coffEEE_project.ui', self)
        self.look_for_button.clicked.connect(self.coffee_search)
        self.choose_coffee_button.clicked.connect(self.coffee_fetch)
        self.disadvant_button(self.disadvant_b())
        self.advant_button(self.advant_b)
        self.advantages_all = ("1. Coffee boosts your physical performance. "
                               "2. Coffee may help you lose weight."
                               "3. Coffee helps you burn fat. "
                               "4. Coffee helps you focus and stay alert. "
                               "5. Coffee lowers risk of death."
                               "6. Coffee reduces risk of cancers."
                               "7. Coffee reduces risk of stroke."
                               "8. Coffee reduces risk of Parkinson’s disease."
                               "9. Coffee protects your body."
                               "10. Coffee may lower risk of Type II diabetes."
                               "11. Coffee protects your brain."
                               "12. Coffee brightens your mood, helps fight depression and lowers risk of suicide.")
        self.disadvantages_all = ("1. Bad coffee can be toxic."
                                  "2. Coffee can kill you."
                                  "3. Coffee can cause insomnia and restlessness."
                                  "4. Don’t drink more than one cup a day if you’re pregnant."
                                  "5. If you have high cholesterol please choose filtered coffee."
                                  "6. Coffee for kids, may increase bedwetting.")
 
        self.connection = sqlite3.connect("coffEEE.db", check_same_thread=False)
        self.cursor = self.connection.cursor()
 
        self.all_comp = [
            "milk", "corn", "water", "whipped_milk",
            "whipped_cream", "milk_and_cream",
            "whiskey", "ice", "chocolate",
            "honey", "syrup"
        ]
 
        self.components_dict = {
            self.milk: "Milk",
            self.corn: "Corn",
            self.whipped_milk: "Whipped milk",
            self.whipped_cream: "Whipped cream",
            self.milk_and_cream: "Milk and cream",
            self.whiskey: "Whiskey",
            self.ice: "Ice",
            self.chocolate: "Chocolate",
            self.honey: "Honey",
            self.syrup: "Syrup"
        }
 
    def coffee_search(self):
        self.needed_components_list_widget.clear()
        part_of_query = f""
 
        for component_object, text in self.components_dict.items():
            if not component_object.isChecked():
                continue
            self.needed_components_list_widget.addItem(text)
            part_of_query += f"AND components.component_name='{text.lower().replace(' ', '_')}'"
 
        if part_of_query:
            full_query = f"""
            SELECT DISTINCT coffee.id, coffee.name, coffee.description
            FROM coffee
            LEFT JOIN coffees_variations ON coffees_variations.id_coffee = coffee.id
            LEFT JOIN components ON components.id = coffees_variations.id_component
            WHERE {part_of_query[3:]};
            """
        else:
            full_query = """
            SELECT DISTINCT coffee.id, coffee.name, coffee.description
            FROM coffee
            LEFT JOIN coffees_variations ON coffees_variations.id_coffee = coffee.id
            LEFT JOIN components ON components.id = coffees_variations.id_component;
            """
 
        self.cursor.execute(full_query)
        self.available_coffee_list_widget.clear()
        result = self.cursor.fetchall()
        if not result:
            dialog = QMessageBox(
                self,
                text="Кратче говоря, нет кофеёчков с таким чаем"
            )
            dialog.show()
            return
 
        for (_id, name, _) in result:
            self.available_coffee_list_widget.addItem(f"{_id}. {name}")
 
    def coffee_fetch(self):
        item: QListWidgetItem
        item = self.available_coffee_list_widget.currentItem()
        if not item:
            return
 
        self.cursor.execute(f"""
        SELECT component_name 
        FROM components 
        LEFT JOIN coffees_variations ON components.id = coffees_variations.id_component
        LEFT JOIN coffee ON coffee.id = {item.text().split(" ")[0]};
        """)
        self.needed_components_list_widget.clear()
        res = self.cursor.fetchall()
        if not res:
            return
 
        for (comp_name,) in res:
            self.needed_components_list_widget.addItem(comp_name)
 
    def advant_b(self):
        dialog = QMessageBox(
            self,
            text="1. Coffee boosts your physical performance. "
                 "2. Coffee may help you lose weight."
                 "3. Coffee helps you burn fat. "
                 "4. Coffee helps you focus and stay alert. "
                 "5. Coffee lowers risk of death."
                 "6. Coffee reduces risk of cancers."
                 "7. Coffee reduces risk of stroke."
                 "8. Coffee reduces risk of Parkinson’s disease."
                 "9. Coffee protects your body."
                 "10. Coffee may lower risk of Type II diabetes."
                 "11. Coffee protects your brain."
                 "12. Coffee brightens your mood, helps fight depression and lowers risk of suicide."
        )
        dialog.setWindowTitle("Плюсы кофе")
        dialog.show()
        return
 
    def disadvant_b(self):
        dialog1 = QMessageBox(
            self,
            text="1. Bad coffee can be toxic."
                 "2. Coffee can kill you."
                 "3. Coffee can cause insomnia and restlessness."
                 "4. Don’t drink more than one cup a day if you’re pregnant."
                 "5. If you have high cholesterol please choose filtered coffee."
                 "6. Coffee for kids, may increase bedwetting."
        )
        dialog1.setWindowTitle("Минусы кофе")
        dialog1.show()
        return
 
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = CoffEEE()
    ex.show()
    sys.exit(app.exec_())