Webcam capture for python - Pops up a preview from your webcam and snaps a picture when you press 'q'

camera.py

import cv2

# Windows dependencies
# - Python 2.7.6: http://www.python.org/download/
# - OpenCV: http://opencv.org/
# - Numpy -- get numpy from here because the official builds don't support x64:
#   http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy

# Mac Dependencies
# - brew install python
# - pip install numpy
# - brew tap homebrew/science
# - brew install opencv

cap = cv2.VideoCapture(0)

while(True):
    ret, frame = cap.read()
    rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)

    cv2.imshow('frame', rgb)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        out = cv2.imwrite('capture.jpg', frame)
        break

cap.release()
cv2.destroyAllWindows()

How could you change this to not need the 'q' key pressed to take the photo? I tried doing this but was unsuccessful:

import time

while(True):
    ret, frame = cap.read()
    rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)

    cv2.imshow('frame', rgb)
    time.sleep(3)
    out = cv2.imwrite('capture.jpg', frame)
    break

hi, how can I turn off the camera indicator