[Python] How can I hide a button after use in Tkinter?

The program supposed to search inside of an Excel file with input of the first and sec name, if the child is there it will reply but if the child is not there it will ask the user if he wants to add him. everything works fine but i cant hide the "yes" button for some reason

yes=Button(text="yes",command=lambda: yesBot(ChildGym,firstNameLabel1,secNameLabel1))
yes.grid(row=4,column=4)


This is the entire code:

import pandas as pd
from tkinter import *
import tkinter.messagebox

root=Tk()
ChildGym = pd.read_excel('TheGloriousEvolution.xlsx')



def findchild(): #check if child is inside excel file
firstNameLabel1=firstNameEntry.get()
secNameLabel1=secNameEntry.get()


for index, row in ChildGym.iterrows():
if not firstNameLabel1:
ans.configure(text="pls enter child first name")
answer=True


break

if not secNameLabel1:
ans.configure(text="pls enter child sec name ")
answer=True


break

if row['FirstName']==firstNameLabel1 and row['SecName']==secNameLabel1:
ans.configure(text="all good!")
answer=True

break

else:
ans.configure(text="the kid is not here")

answer=False


if answer==False:

yes=Button(text="yes",command=lambda: yesBot(ChildGym,firstNameLabel1,secNameLabel1))
yes.grid(row=4,column=4)
nobot.grid(row=4,column=3)
askMan.grid(row=4,column=2)


else:
answer=True



def yesBot(ChildGym,firstNameLabel1,secNameLabel1):
ChildGym_new_row = pd.DataFrame({ 'FirstName': [firstNameLabel1], 'SecName': [secNameLabel1] })
ChildGym=pd.concat([ChildGym,ChildGym_new_row], axis=0)
ans2.configure(text="kid got added succesfully!")
ChildGym.to_excel("TheGloriousEvolution.xlsx", index=False)

def noBot():

askMan.grid_forget()
nobot.grid_forget()


# botton "click me" to do the def "find child"
Bot=Button(root,text="click me",command=findchild)

Bot.grid(row=0,column=4)


#label to ask if he wants to add the user
askMan=Label(text="do you want to add this child?")


#button to press no if you dont want to add this child
nobot=Button(root,text="no",command=noBot)

# label and entry for the first name
firstNameLabel=Label(text="what is the first name of the kid you want to search?")
firstNameLabel.grid(row=0,column=0)
firstNameEntry=Entry(root)
firstNameEntry.grid(row=0,column=1)


# labels to give answer if the kid is inside the excel file
ans=Label(root)
ans.grid(row=0,column=2)

# labels to give answer if they added to the excel file
ans2=Label(root)
ans2.grid(row=4,column=1)


# label and entry for the second name
secNameLabel=Label(text="what is the sec name of the kid you want to search?")
secNameLabel.grid(row=1,column=0)
secNameEntry=Entry(root)
secNameEntry.grid(row=1,column=1)




root.mainloop()

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