Piezo with Python on RPi?

[Don Davis]

I'm looking for a Python Piezo example [not Java or C].
Any recommendations?

[Don Davis]

Ah, If anyone's curious (who didn't know) - Piezos can be controlled
with software PWM.

#! /usr/bin/python

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
GPIO.setup(15, GPIO.OUT)

c = 261
d = 294
e = 329
f = 349
g = 392
a = 440
b = 493
C = 423
r = 1

p = GPIO.PWM(15, 100)


## Define function named Blink()
def Blink(numTimes, speed):
for i in range(0,numTimes):
print "Iteration " + str(i+1)
GPIO.output(7, True)
GPIO.output(15, True)
time.sleep(speed) ## Wait
p.start(100) # start the PWM on 100 percent duty
cycle
p.ChangeDutyCycle(90) # change the duty cycle to 90%
p.ChangeFrequency(c) # change the frequency to 261 Hz (floats
also work)
time.sleep(speed) ## Wait
p.ChangeFrequency(d) # change the frequency to 294 Hz (floats
also work)
time.sleep(speed) ## Wait
p.ChangeFrequency(e)
time.sleep(speed) ## Wait
p.ChangeFrequency(f)
time.sleep(speed) ## Wait
p.ChangeFrequency(g)
time.sleep(speed) ## Wait
p.ChangeFrequency(a)
time.sleep(speed) ## Wait
p.ChangeFrequency(b)
time.sleep(speed) ## Wait
p.ChangeFrequency(C)
time.sleep(speed) ## Wait
p.ChangeFrequency(r)
time.sleep(speed) ## Wait
p.stop() # stop the PWM output

print "Done" ## When loop is complete, print "Done"
GPIO.cleanup()

iterations = 4
speed = 2

Blink(int(iterations),float(speed))