RPi.GPIO.wait_for_edge(4, GPIO.FALLING) detects both press and release of button

I've read the documentation for RPi.GPIO, and searched Google as well as SO, but can't quite find a solution to what is probably a very dumb problem. I'm trying to ONLY detect the edge of my button being pressed. But regardless of whether I specify to look for a "falling" or "rising" edge, the Pi will execute a command on both press and release of my button. Sometimes it executes the code a bunch of times. My code:

import RPi.GPIO as GPIO

buttonPin = 4                 # this is the pin for the button
GPIO.setmode(GPIO.BCM)                 # pinmode
GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)                 #setting up my pin to be input w/ pullup resistor

if __name__ == '__main__':
    while True:                 # loop
        GPIO.wait_for_edge(buttonPin,GPIO.RISING)                 # looking for a rising edge
        print('Edge detected')                 # this happens regardless of my button being pressed or released

Quite sure I'm missing something fundamental here, any help greatly appreciated.

Solution

You can solve it programmatically with parameter bouncetime but, you have to use

GPIO.add_event_detect(channel, GPIO.RISING, callback=my_callback, bouncetime=200)

GPIO.add_event_callback(channel, my_callback, bouncetime=200)

instead of GPIO.wait_for_edge(channel,GPIO.RISING)

or with additional hardware: add a 0.1uF capacitor across your switch,

or you can use combination of both.