import RPi.GPIO as GPIO  # Import library for GPIO (pin) access
GPIO.setmode(GPIO.BOARD) # Specify that we use the BOARD numbers (pin numbers 1-26 on the connector)
GPIO.setwarnings(False)  # Disable the warning "This channel is already in use"
import time

GPIO.setup(22, GPIO.IN)  # Configure pin 22 as an input (IN)

print('I am waiting that you press the button...')

while True:
    x = GPIO.input(22)  # Read pin 22
    if x == 0:          # if the button is pressed...
        break           # ... the break statements terminates the while loop
    time.sleep(0.01)    # wait 10ms before checking pin 22 again
    
print('Button pressed!')