def fetch_and_send():
""" Modify feed of speed changes - or at least keep it warm """
global feed_state, prev_speed, speed
if feed_state == "warm":
# A warm state means that previous speed exists and is not stale
assert prev_speed is not None
speed = bronx_speed()
if speed is None:
feed_state = "cold"
alert()
mw.touch(name=NAME)
else:
speed = float(speed)
speed_change = float(speed) - float(prev_speed)
if abs(speed_change) < 1e-5:
feed_state = "cold" # Feed is stale, don't judge
print("**** Feed unchanged at " +
str(datetime.datetime.now()),
flush=True)
else:
with Timer() as t_put:
mw.set(name=NAME, value=speed_change)
print("Sending speed change " + str(speed_change) +
" at " + str(datetime.datetime.now()),
flush=True)
print(str(t_put.elapsed) + 's putting data.', flush=True)
prev_speed = speed
elif feed_state == "cold":
# Wait until feed is back up and speeds start changing
prev_prev = prev_speed if prev_speed else None
prev_speed = bronx_speed()
if (prev_speed is not None) and (prev_prev is not None) and abs(
float(prev_prev) - float(prev_speed)) > 1e-5:
feed_state = "warm"
print("**** Feed resumed at " + str(datetime.datetime.now()),
flush=True)
else:
mw.touch(name=NAME)
print("Touch at " + str(datetime.datetime.now()) + " - speed is " +
str(prev_speed),
flush=True)
def poll_and_send_if_changed():
""" Modify feed of speed changes - or at least keep it warm """
global speed, prev_speed
if prev_speed is None:
prev_speed = bronx_speed()
speed = None
else:
speed = bronx_speed()
try:
fspeed = float(speed)
fprev = float(prev_speed)
if abs(fspeed-fprev)>1e-5:
print( mw.set(name=NAME,value=fspeed-fprev) )
prev_speed = speed
else:
mw.touch(name=NAME)
except:
mw.touch(name=NAME)
pprint({"time":str(datetime.datetime.now()),"prev_speed":prev_speed,"speed":speed})
def poll_and_send():
""" Create stream of traffic speed """
value = bronx_speed()
res = mw.set(name=NAME, value=float(value))
pprint({'speed': value, "res": res})
print('', flush=True)
def test_live():
bs = bronx_speed()
#!/usr/bin/python3.8
from microprediction import MicroWriter
from microprediction.live import bronx_speed
from apscheduler.schedulers.blocking import BlockingScheduler
from pprint import pprint
import datetime
# Example of sending live data to www.microprediction.com
# Data server is really slow
NAME = 'bronx_traffic_absolute_speed.json'
# Let's fail fast
initial_value = float(bronx_speed())
print("Initial value is " + str(initial_value), flush=True)
try:
from microprediction.config_private import TRAFFIC_WRITE_KEY
mw = MicroWriter(write_key=TRAFFIC_WRITE_KEY)
except:
raise Exception("You need to set the write key for this example to work")
def poll_and_send():
""" Create stream of traffic speed """
value = bronx_speed()
res = mw.set(name=NAME, value=float(value))
pprint({'speed': value, "res": res})
print('', flush=True)