import time
class GovernedRange(object):
def __init__(self, low, high, speed=1):
"""
Returns a range of floats, where each consecutive number is
incremented at a speed * time between iterations, rather than
a set value.
low: start of range
high: top of range
speed: amount to increment, per second.
"""
self.speed = float(speed)
self.low = float(low)
self.high = float(high)
self._i = self.low
self._t = time.time()
def __iter__(self):
while True:
yield self.next()
def next(self):
speed = float(self.speed)
inc = speed * (time.time() - self._t)
i = self._i
i += inc
self._t = time.time()
if i >= self.high: raise StopIteration
self._i = i
return i
for x in GovernedRange(1,5,speed=1):
print x
time.sleep(0.1)
