WEBVTT

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so in this video we are going to do a
challenge I'm gonna challenge you to

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complete a particular challenge for this
section of the course which is of course

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dealing with time zone and what I'm gonna
do is paste it in and talk about it

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and then get you to actually do the
challenge so first things first is create a

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new file here I got the same project
open as last time right click on that

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new Python file I'm gonna call it timechallenge
that is the timezone challenge going to paste the code in

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so let's go
through and discuss what the challenge

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is and essentially I'm asking you to create a
program that allows a user of your

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program to choose one of up to nine
different time zones from a menu you

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can choose any zone you want from the
all_timezones list that's going to be

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where you save the time zones for
this program and the program will then

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display the time in that time zone as
well as local time and UTC time entering

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0 choice from the menu will quit
the program so you want to display the dates and

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times in a format suitable for the user
of your program to understand and you should also

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include the timezone name when
displaying the chosen name so that's it

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that's the challenge so I suggest you do
now is go away and see if you can solve that and

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when you're ready to come back you can come
back and check our solution and take

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it from their so pause the video now and
I'll see you when you get back

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hopefully you managed to get this working or
have a good stab at it any way so lets go through now

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our implementation and see if its something
similar to what you came up with so

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first we need to do our 2 imports from modules which we have been doing....

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.....

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.....so next we need all the time
zones lists where we can choose where we can

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choose from up to nine times and so what
we're going to do is create that so....

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.....

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.....and I'm gonna start with one
that's gonna be the choice for the menu you don't

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have to strictly use these
that I come up with as long as you got

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separate ones......also get the spelling on these correct because

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if their wrong and they don't match the time zone
you get a problem....

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.....

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...so that's

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our available list of nine options so what
we want to do now is accept input from

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that and then start displaying it so
first things first lets print a message that

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people see on the screen so... which we mentioned was

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part of the instructions there.....

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.....

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......

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....the format began to include
the place which was obviously from the

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list and also available_zones....

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...so we are getting the number as well as the actual location so

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that's our loop to display them on the
screen and what we're doing now is

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work on the loop that accepts input from
the user and continues to loop until I press 0

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so put...so its going to continue
looping until I enter 0 to exit...

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.....

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....

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...so that's going to break out of the while loop and end the program but if

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we're not exited then what we need to do is we need
to look up and see whether the choice

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entered is in the keys so the way to do that is...

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.....so
in other words if the number 1 to 9 has that

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been entered if it isn't there we are gonna put....

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.....

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......

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.......

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.....

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....and we're going to format that to a proper

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time we talked about that on line 10 display dates and times in a format

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suitable for the uses of your program to
understand so we've done this before we are gonna do

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something similar

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we are....

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.....

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....

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.....so that's the first one

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we also want to print out local time so that's part of the
challenge as well to do that so lets go

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ahead and do that and it's going to be.....the local time is of course the local

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time in which ever time zone your
currently running this in for me its gonna

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Australian central
Daylight Time format and it's going to

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be..... we are going to use basically the same format very similar format

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and we are going to use...to get the current time but then
format the actual time so...

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.....

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....

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.....

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.....and the difference there is
we're going to use instead of now we're

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going to use UTC now to get the current
UTC time and everything should be the

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same and add one last final print to space it out a bit in the end and that should

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be it that should be all we need to do and I'll just delete the spaces and leave one space as per the standard

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Python way of doing things and now we've
done that we should find that we're good

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to go

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what would do first is try
running it right click and run time

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challenge you can see we've currently got
the menu showing please choose a time zones or 0

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to quit so type 0 to quit to make sure that works ok that work well

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as we expected to do all right so let's to
time zone that we know works lets do 3 for Australian

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Adelaide and we got an error on line 38 now
we just have a look at that error

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unknown time zone and the reason
that's unknown is up typed Australian

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instead of Adeliade how embarrassing my own timezone
so that should be

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Australia Adelaide remember earlier in
the challenge in this video I mentioned

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the need to not make any typos and of course
is another one on line 4 in my haste to

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try and dp this video and type of the
same time I seem to be failing at task

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need to make sure that you fixed the typos to have any chance of this working

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lets try it again number 3

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Australia / Adelaide this time and we actually
got something which is good and we have

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a look at our time wednesday at 1:40
which is converted to 1:49 their because you can see

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it was on 55 seconds

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UTC time is second of the third sixty
you can see the format we used and noticed

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before when I look at the code we did the %z for the first line and

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then we can see that by doing that we
added the time zone information the

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extra information that's appearing on
this first line the others lines have also

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got the current day and then the date month and year and time but we also added

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timezone and that's what the other entry was so that's working ok so lets try a couple

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of others to make sure we don't got any problems here 1 the time in
Africa Tunis is Wednesday 4:19 a.m.

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CET so if we actually do a search for current
time we put current time 4:19 am and its

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GMT +1 time in Tunisia which should be
correct obviously and you can see where

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+1 there is as well so its definitely
working and just try another

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one lets just try 6 Japan current time
in japan is 12:20 and +9 which is JST current time Japan

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...you can see currently the time is 12:20 JST time and if you go back and have a

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look again 12:20 so that is all working and what the heck of it lets try another Hawaii current time -10 HST

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so you can see obviously the time zones are
working nicely

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lets check that current time Hawaii

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5:20 p.m. 2nd of February HST 17:20 which is 5:20 p.m. so that's it that's

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actually the solution that's the
challenge done and dusted so I hope you

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got a lot out of that so we are now done
with time time zones dates etc

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in the next lecture what we're going to
do is we're going to take a little bit of a side ways

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trip what we gonna do is start
looking or have a brief look at tk enter

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this is the tk  widget tool from Python which
allows GUI programs to be created

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so it's not going to be like a huge sort
of section on this but it's going to give you

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an idea on how to start looking at
GUI interfaces so will start looking

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at doing that in the next video