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Car2Go_Manager.py
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import sys
def print_exception ():
exc_type, exc_obj, exc_tb = sys.exc_info()
print exc_type
print exc_obj
print exc_tb.tb_lineno
import datetime
import time
start_cols = [
"start_time",
"latitude",
"longitude",
"fuel"
]
from DataBaseProxy import dbp
import pandas as pd
def pre_process (df):
df["longitude"] = df.coordinates.apply(lambda x: x[0])
df["latitude"] = df.coordinates.apply(lambda x: x[1])
return df.drop("coordinates", axis=1)
class Car2Go_Manager ():
def __init__ (self, city):
self.name = "car2go " + city
self.city = city
doc = dbp.find_last("snapshots",
{"provider":"car2go","city":self.city}).next()
self.last_time = doc["timestamp"]
self.last = pd.DataFrame(doc["snapshot"]["placemarks"]).set_index("name")
self.last = pre_process(self.last)
self.fleet = self.last.index
self.active_parkings = pd.DataFrame(columns = start_cols, index=self.last.index)
self.active_parkings["start_time"] = datetime.datetime.now()
self.active_parkings["latitude"] = self.last.latitude
self.active_parkings["longitude"] = self.last.longitude
self.active_parkings["fuel"] = self.last.fuel
self.active_bookings = pd.DataFrame(columns = start_cols, index=[])
def check (self):
try:
doc = dbp.find_last("snapshots", {"provider":"car2go","city":self.city}).next()
print len(doc)
self.current_time = doc["timestamp"]
self.current = pd.DataFrame(doc["snapshot"]["placemarks"]).set_index("name")
self.current = pre_process(self.current)
except:
print "Exception in " + self.name
print_exception()
if not self.current.equals(self.last):
# Detect new cars
# print "Fleet"
# print self.fleet.shape
self.new_cars = self.current.index.difference(self.fleet)
# print self.new_cars.shape
# Indexes creation
# print "Status"
self.still_parked = self.fleet.intersection(self.current.index)
self.just_booked = self.active_parkings.index.difference(self.current.index).intersection(self.fleet)
self.just_parked = self.current.index.intersection(self.fleet).difference(self.active_parkings.index)
# print self.still_parked.shape
# print self.just_booked.shape
# print self.just_parked.shape
# - New parkings
self.active_parkings = pd.concat([self.active_parkings, pd.DataFrame(index=self.just_parked)])
self.active_parkings.loc[self.just_parked, "start_time"] = \
self.current_time
self.active_parkings.loc[self.just_parked,"latitude"] = \
self.current.loc[self.just_parked, "latitude"].values
self.active_parkings.loc[self.just_parked,"longitude"] = \
self.current.loc[self.just_parked, "longitude"].values
self.active_parkings.loc[self.just_parked,"fuel"] = \
self.current.loc[self.just_parked, "fuel"].values
# - New bookings
self.active_bookings = pd.concat([self.active_bookings, pd.DataFrame(index=self.just_booked)])
self.active_bookings.loc[self.just_booked, "start_time"] = \
self.current_time
self.active_bookings.loc[self.just_booked,"start_latitude"] = \
self.active_parkings.loc[self.just_booked, "latitude"].values
self.active_bookings.loc[self.just_booked,"start_longitude"] = \
self.active_parkings.loc[self.just_booked, "longitude"].values
self.active_bookings.loc[self.just_booked,"start_fuel"] = \
self.active_parkings.loc[self.just_booked, "fuel"].values
# - Parkings terminated
def record_parking(parkings):
parkings["end_time"] = datetime.datetime.now()
recorded = parkings.T.to_dict()
if len(recorded.keys()):
record = {
"provider":"car2go",
"city":self.city,
"timestamp":datetime.datetime.now(),
"parkings":recorded
}
dbp.insert("parkings", record)
record_parking(self.active_parkings.loc[self.just_booked])
self.active_parkings.drop(self.just_booked, inplace=True)
self.last = self.current
self.last_time = self.current_time
# - Bookings terminated
def record_booking(bookings):
bookings["end_time"] = datetime.datetime.now()
bookings["end_fuel"] = self.current.loc[bookings.index, "fuel"].values
bookings["end_latitude"] = self.current.loc[bookings.index, "latitude"].values
bookings["end_longitude"] = self.current.loc[bookings.index, "longitude"].values
recorded = bookings.T.to_dict()
if len(recorded.keys()):
record = {
"provider":"car2go",
"city":self.city,
"timestamp":datetime.datetime.now(),
"bookings":recorded
}
dbp.insert("bookings", record)
record_booking(self.active_bookings.loc[self.just_parked.intersection(self.active_bookings.index)])
self.active_bookings.drop(self.just_parked.intersection(self.active_bookings.index), inplace=True)
# - Update fleet
self.fleet = self.fleet.union(self.current.index)
# print self.fleet.shape
from conf import cities
managers = {}
for city in cities["car2go"]:
managers[city] = Car2Go_Manager(city)
while True:
for city in cities["car2go"]:
managers[city].check()
time.sleep(50)
#manager = Car2Go_Manager(sys.argv[1])
#manager.start()