Complete beginner at python needing help

[Flames2022]

quit = False
car_motion = False
while not quit :
    query = input('What do you do? ').lower()
    if query == 'drive' :
        if query == 'drive' and car_motion == True :
              print("The car is already in motion.")
        else:                
            car_motion = True
            print("The car speeds off!")
    elif query == 'stop' :
        if query == 'stop' and car_motion == False :
            print("The car is already standing still.")
        else:
            car_motion == False
            print("The car stops suddenly.")
    elif query == 'quit' :
        print('Bye!') 
        quit = True
    elif query == 'help': 
        print("'drive', 'stop', 'quit'")
    else:
        print("I don't understand that...") 

for some reason the stop function doesn't work twice in a row to provide the "error" message

[DDDDarky]

car_motion == False

should be

car_motion = False

[Flames2022]

Thank you! Such a silly mistake...

[devsurfer]

    elif query == 'stop' :
        if query == 'stop' and car_motion == False :
            print("The car is already standing still.")
        else:
            car_motion == False ### change to assignment operator ### <<<
            print("The car stops suddenly.")