I spent one or two days writing this code. This small program is very interesting and useful, especially when you book the airline ticket and do not know how much time it'll cost during each phase.
For this code, I use lots of modules like pytz, datetime to simulate the World Clock , and tkinter to monitor GUI. The programming was not very easy, but really enjoyed the process.
#!/usr/bin/env python
import os
from collections import defaultdict
from datetime import *
from urllib import urlretrieve
from urlparse import urljoin
from zipfile import ZipFile
import datetime
import time
import pytz
from Tkinter import *
import tkMessageBox
class flightTime:
def findtz(self,city):
geonames_url = 'http://download.geonames.org/export/dump/'
basename = 'cities15000'
filename = basename + '.zip'
if not os.path.exists(filename):
urlretrieve(urljoin(geonames_url, filename), filename)
city2tz = defaultdict(set)
with ZipFile(filename) as zf, zf.open(basename + '.txt') as file:
for line in file:
fields = line.split(b't')
if fields:
name, asciiname, alternatenames = fields[1:4]
timezone = fields[-2].decode('utf-8').strip()
if timezone:
for acity in [name, asciiname] + alternatenames.split(b','):
acity = acity.decode('utf-8').strip()
if acity:
city2tz[acity].add(timezone)
for tzname in city2tz[city]:
now = datetime.datetime.now(pytz.timezone(tzname))
return "%s" % (tzname)
def ft(self,data1,data2,data3,data4):
fmt = '%m-%d-%Y %H:%M'
city1=self.findtz(data1)
d1 = datetime.datetime.strptime(data2, fmt)
city2=self.findtz(data3)
d2 = datetime.datetime.strptime(data4, fmt)
local1 = pytz.timezone (city1)
local1_dt = local1.localize(d1, is_dst=None)
utc1_dt = local1_dt.astimezone (pytz.utc)
local2 = pytz.timezone (city2)
local2_dt = local2.localize(d2, is_dst=None)
utc2_dt = local2_dt.astimezone (pytz.utc)
d1_ts = time.mktime(utc1_dt.timetuple())
d2_ts = time.mktime(utc2_dt.timetuple())
elapsed = (d2_ts-d1_ts)/60
days=elapsed//(24*60)
hours=elapsed%(24*60)//60
minutes=elapsed%(24*60)%60
return ("Your flight time is: "+str(int(days))+" days "+str(int(hours))+" hours "+str(int(minutes))+" minutes")
class HavenButtons:
def __init__(self,master):
frame=Frame(master, width=300, height=250)
frame.pack()
self.label_ff = Label(frame, text="Enter the city and time (mm-dd-yyyy 24:00) you fly from", fg="blue")
self.label_ft = Label(frame, text="Enter the city and time (mm-dd-yyyy 24:00) you fly to", fg="blue")
self.label_1 = Label(frame, text="Fly from:")
self.label_2 = Label(frame, text="Departure time:")
self.label_3 = Label(frame, text="Fly to:")
self.label_4 = Label(frame, text="Arrival time:")
self.entry_1 = Entry(frame)
self.entry_2 = Entry(frame)
self.entry_3 = Entry(frame)
self.entry_4 = Entry(frame)
self.label_ff.grid(row=0, columnspan=2, sticky=W)
self.label_1.grid(row=1, sticky=E)
self.label_2.grid(row=2, sticky=E)
self.entry_1.grid(row=1, column=1)
self.entry_2.grid(row=2, column=1)
self.label_ft.grid(row=3, columnspan=2, sticky=W)
self.label_3.grid(row=4, sticky=E)
self.label_4.grid(row=5, sticky=E)
self.entry_3.grid(row=4, column=1)
self.entry_4.grid(row=5, column=1)
self.okButton = Button(frame, text="Ok", command=self.printMessage)
self.okButton.pack(side=LEFT)
self.okButton.grid(row=6, columnspan=2)
self.quitButton = Button(frame, text="Quit", command=frame.quit)
self.quitButton.pack(side=LEFT)
self.quitButton.grid(row=6, column=1, columnspan=2)
def printMessage(self):
s = flightTime()
content=s.ft(self.entry_1.get(), self.entry_2.get(), self.entry_3.get(), self.entry_4.get())
tkMessageBox.showinfo("Show result", content)
root = Tk()
b=HavenButtons(root)
root.mainloop()
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