[Tutor] Contents of Tutor digest Vol 86 Issue 57
Lea Parker
lea-parker at bigpond.com
Sat Apr 16 01:58:07 CEST 2011
Hi Michael Scott
Thank you and yes I agree there is room for user error. I am going to add a
validator but I wanted to get the first part right. I appreciate your
comment on the white space too.
Being a beginner I find it easier to write the main thing I want the code to
do and then add extra to make it work efficiently. Perhaps not what a
programmer does but it helps me this way.
Thanks so much.
Leonie
-----Original Message-----
From: tutor-bounces+lea-parker=bigpond.com at python.org
[mailto:tutor-bounces+lea-parker=bigpond.com at python.org] On Behalf Of
tutor-request at python.org
Sent: Saturday, 16 April 2011 9:43 AM
To: tutor at python.org
Subject: Tutor Digest, Vol 86, Issue 57
Send Tutor mailing list submissions to
tutor at python.org
To subscribe or unsubscribe via the World Wide Web, visit
http://mail.python.org/mailman/listinfo/tutor
or, via email, send a message with subject or body 'help' to
tutor-request at python.org
You can reach the person managing the list at
tutor-owner at python.org
When replying, please edit your Subject line so it is more specific than
"Re: Contents of Tutor digest..."
Today's Topics:
1. Re: Help - accumulator not working (Lea) (michael scott)
2. Re: Help - accumulator not working (Lea) (Alan Gauld)
3. Re: than "Re: Contents of Tutor digest..." Tutor Digest, Vol
86, Issue 56 (Lea Parker)
----------------------------------------------------------------------
Message: 1
Date: Fri, 15 Apr 2011 15:46:32 -0700 (PDT)
From: michael scott <jigenbakuda at yahoo.com>
To: tutor at python.org
Subject: Re: [Tutor] Help - accumulator not working (Lea)
Message-ID: <670739.27615.qm at web130203.mail.mud.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Hi Lea, how are you today?
Well please keep in mind that nothing is "wrong" with your code, its doing
exactly what you asked it to do. But I would call your attention to your
while loop, you want to accumulate things, but may I ask exactly what are
you accumulating in your loop?
Also quite by accident I entered 00 as my budget and I got a negative
surplus, lol. Perhaps you should implement something that ensures that a
(stupid) user like myself does not enter a 0- or negative value for the
budget. Just a thought...
To help me attempt to understand the small programs I write, I pretend that
I'm the computer and I literally compute the program as if I was the
interpreter, I follow each line of my code to truly understand it. Perhaps
with these gentle nudges you will solve your problem :)
----
What is it about you... that intrigues me so?
________________________________
From: Lea Parker <lea-parker at bigpond.com>
To: tutor at python.org
Sent: Fri, April 15, 2011 5:52:22 PM
Subject: [Tutor] Help - accumulator not working (Lea)
Hello
I am trying to create this program for a uni assignment. I cannot get it to
add the expenses to the accumulator I have set. Would you mind having a look
and letting me know if I have something in the wrong place or indented
incorrectly.
Perhaps I am missing something.
There could be other things wrong but I need to fix this first and then I
can focus on the next thing. I have difficulty trying to fix lots of things
at once so if you could just comment on the problem and I will ask again if
I can?t work out the next problem I have. I like to have a go myself first.
J
My code is:
"""This program is to calculate if the user is over or under budget for the
month"""
def main():
# Create an accumulator
total_expense = 0.0
# Ask user for the monthly budget
budget = float(raw_input('Enter the amount of your budget for the month:
$'))
# Calculate a series of expenses
expense = float(raw_input('Enter your first expense $'))
# Accumlate expense
total_expense = total_expense + expense
# Continue processing as long as the user
# does not enter 0
while expense != 0:
#Get another expense
expense = float(raw_input('Enter the next expense or 0 to finish
$'))
#Calculate surplus
surplus = budget - total_expense
#Display results
print 'Your total expenses for the month $', total_expense
print 'Your surplus amount after expenses $', surplus
# Call the main function.
main()
Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.python.org/pipermail/tutor/attachments/20110415/d62c34c3/attach
ment-0001.html>
------------------------------
Message: 2
Date: Sat, 16 Apr 2011 00:27:22 +0100
From: "Alan Gauld" <alan.gauld at btinternet.com>
To: tutor at python.org
Subject: Re: [Tutor] Help - accumulator not working (Lea)
Message-ID: <ioak8p$4sq$1 at dough.gmane.org>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
"Lea Parker" <lea-parker at bigpond.com> wrote
> I am trying to create this program for a uni assignment. I cannot get
> it to add the expenses to the accumulator I have set.
You have to write the code to add each value to the accumulator Your loop
does not do that....
> """This program is to calculate if the user is over or under budget
>
> for the month"""
>
>
>
>
Wow! Thats a lot of whitespace.
It is good to separate code blocks into logical segments with whitespace,
but too much of it just makes the code flow hard to see. In the old days of
green screen terminals on mainframes they used to say that a function should
all fit on a single screen - 24 lines. Nowadays we don't need to be quite so
penny pinching, but the concept of seeing the whole flow in one place is a
good one.
I'll remove some excess space below...
> def main():
> # Create an accumulator
Oh, and if you can use a good variable name to describe the variable you
don't need a comment either - It's just more distracting wasted space.
Comments are to explain
*why* (and occasionally, for the really obscure, how), but good names
describe what.
> total_expense = 0.0
> budget = float(raw_input('Enter the amount of your budget for the
> month:'))
>
> # Calculate a series of expenses
I left this comment because it explains why we have a loop...
> expense = float(raw_input('Enter your first expense $'))
> total_expense = total_expense + expense
> while expense != 0:
> expense = float(raw_input('Enter the next expense or 0 to
> finish'))
> surplus = budget - total_expense
>
> print 'Your total expenses for the month $', total_expense
> print 'Your surplus amount after expenses $', surplus
>
> main()
Hopefully that makes it easier to see what you missed out?
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
------------------------------
Message: 3
Date: Sat, 16 Apr 2011 09:42:41 +1000
From: "Lea Parker" <lea-parker at bigpond.com>
To: <tutor at python.org>
Subject: Re: [Tutor] than "Re: Contents of Tutor digest..." Tutor
Digest, Vol 86, Issue 56
Message-ID: <000501cbfbc6$cfafc350$6f0f49f0$@bigpond.com>
Content-Type: text/plain; charset="us-ascii"
Thank you message 4 this has solved my problem I can now work out the next
part of my program. Thank you so much.
-----Original Message-----
From: tutor-bounces+lea-parker=bigpond.com at python.org
[mailto:tutor-bounces+lea-parker=bigpond.com at python.org] On Behalf Of
tutor-request at python.org
Sent: Saturday, 16 April 2011 8:47 AM
To: tutor at python.org
Subject: Tutor Digest, Vol 86, Issue 56
Send Tutor mailing list submissions to
tutor at python.org
To subscribe or unsubscribe via the World Wide Web, visit
http://mail.python.org/mailman/listinfo/tutor
or, via email, send a message with subject or body 'help' to
tutor-request at python.org
You can reach the person managing the list at
tutor-owner at python.org
When replying, please edit your Subject line so it is more specific than
"Re: Contents of Tutor digest..."
Today's Topics:
1. Help to explain commenting (Andr?s Chand?a)
2. Re: Python on TV (Alan Gauld)
3. Help - accumulator not working (Lea) (Lea Parker)
4. Re: Help - accumulator not working (Lea) (Joel Goldstick)
----------------------------------------------------------------------
Message: 1
Date: Fri, 15 Apr 2011 18:21:43 +0200
From: "Andr?s Chand?a" <andres at chandia.net>
Subject: [Tutor] Help to explain commenting
Message-ID:
<957d7e2abbfe95f19b83cef056261697.squirrel at mail.chandia.net>
Content-Type: text/plain; charset="iso-8859-1"
Hello everybody,
I could finally complete succesfully the code I was working with. As I'm
quite new to python, many of the things I have in my code are copied from
different sources, and I do not undertand all of them, well, I have to
deliver this code for a project, and in the best documented way that I
could, I already commented all that I know, and I suppouse wrongly in some
parts.
So the request is, if you can take a look at the code, comment the parts
that are not yet commented, correct the errors, and propouse some
improvement in the parts you think diserves it.
I attach the code in a tgz file, if
the attached can not be seen then this link:
http://www.chandia.net/compart/NMT-2.4-20110415.tar.gz
Thanks in advance to all
of you and to the people that already helped me.
_______________________
????????????andr?s
chand?a
P
No imprima innecesariamente. ?Cuide el medio ambiente!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: NMT-2.4-20110415.tar.gz
Type: application/x-gzip
Size: 4177 bytes
Desc: not available
URL:
<http://mail.python.org/pipermail/tutor/attachments/20110415/937a8c20/attach
ment-0001.bin>
------------------------------
Message: 2
Date: Fri, 15 Apr 2011 20:35:14 +0100
From: "Alan Gauld" <alan.gauld at btinternet.com>
To: tutor at python.org
Subject: Re: [Tutor] Python on TV
Message-ID: <ioa6lh$sb7$1 at dough.gmane.org>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
"bob gailer" <bgailer at gmail.com> wrote
>> The show should be here - Pause at 1 minute 20 for the Python
>> screnshot:
>>
>> http://fwd.channel5.com/gadget-show/videos/challenge/surprise-special
>> -part-4
>
> I am told "the video ... cannot be viewed from your currrent country
> ..."
I don't know if YouTube will be any more obliging but try this:
http://www.youtube.com/watch?v=oDNZP1X30WE&list=SL
Python can be seen at around 29 mins 45 secs...
Enjoy (I hope)
Alan G.
------------------------------
Message: 3
Date: Sat, 16 Apr 2011 07:52:22 +1000
From: "Lea Parker" <lea-parker at bigpond.com>
To: <tutor at python.org>
Subject: [Tutor] Help - accumulator not working (Lea)
Message-ID: <000001cbfbb7$666bd140$334373c0$@bigpond.com>
Content-Type: text/plain; charset="us-ascii"
Hello
I am trying to create this program for a uni assignment. I cannot get it to
add the expenses to the accumulator I have set. Would you mind having a look
and letting me know if I have something in the wrong place or indented
incorrectly. Perhaps I am missing something.
There could be other things wrong but I need to fix this first and then I
can focus on the next thing. I have difficulty trying to fix lots of things
at once so if you could just comment on the problem and I will ask again if
I can't work out the next problem I have. I like to have a go myself first.
J
My code is:
"""This program is to calculate if the user is over or under budget
for the month"""
def main():
# Create an accumulator
total_expense = 0.0
# Ask user for the monthly budget
budget = float(raw_input('Enter the amount of your budget for the month:
$'))
# Calculate a series of expenses
expense = float(raw_input('Enter your first expense $'))
# Accumlate expense
total_expense = total_expense + expense
# Continue processing as long as the user
# does not enter 0
while expense != 0:
#Get another expense
expense = float(raw_input('Enter the next expense or 0 to finish
$'))
#Calculate surplus
surplus = budget - total_expense
#Display results
print 'Your total expenses for the month $', total_expense
print 'Your surplus amount after expenses $', surplus
# Call the main function.
main()
Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.python.org/pipermail/tutor/attachments/20110416/b09f472e/attach
ment-0001.html>
------------------------------
Message: 4
Date: Fri, 15 Apr 2011 18:47:21 -0400
From: Joel Goldstick <joel.goldstick at gmail.com>
To: tutor at python.org
Subject: Re: [Tutor] Help - accumulator not working (Lea)
Message-ID: <BANLkTim1iPGn=sGWKLq6PUq58oBEVZTbFg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Fri, Apr 15, 2011 at 5:52 PM, Lea Parker <lea-parker at bigpond.com> wrote:
> Hello
>
>
>
> I am trying to create this program for a uni assignment. I cannot get
> it to add the expenses to the accumulator I have set. Would you mind
> having a look and letting me know if I have something in the wrong
> place or indented incorrectly. Perhaps I am missing something.
>
>
>
> There could be other things wrong but I need to fix this first and
> then I can focus on the next thing. I have difficulty trying to fix
> lots of things at once so if you could just comment on the problem and
> I will ask again if I can?t work out the next problem I have. I like to
have a go myself first.
> J
>
>
>
> My code is:
>
>
>
> """This program is to calculate if the user is over or under budget
>
> for the month"""
>
>
>
>
>
> def main():
>
>
>
> # Create an accumulator
>
> total_expense = 0.0
>
>
>
> # Ask user for the monthly budget
>
> budget = float(raw_input('Enter the amount of your budget for the
> month: $'))
>
>
>
above here is good
>
>
> # Calculate a series of expenses
>
> expense = float(raw_input('Enter your first expense $'))
>
>
>
I would remove the input above and move it to your loop.
> # Accumlate expense
>
> total_expense = total_expense + expense
>
>
above you don't need this since you haven't added anything yet (see below)
>
>
I set expense to 1 just to get the loop started. It could be anything but 0
> # Continue processing as long as the user
>
> # does not enter 0
>
> while expense != 0:
>
>
>
> #Get another expense
>
> expense = float(raw_input('Enter the next expense or 0 to
> finish
> $'))
>
>
>
> #Calculate surplus
>
> surplus = budget - total_expense
>
>
>
> #Display results
>
> print 'Your total expenses for the month $', total_expense
>
> print 'Your surplus amount after expenses $', surplus
>
>
>
> # Call the main function.
>
> main()
>
>
>
> Thank you.
>
> _______________________________________________
> Tutor maillist - Tutor at python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>
def main():
# Create an accumulator
total_expense = 0.0
# Ask user for the monthly budget
budget = float(raw_input('Enter the amount of your budget for the month:
$'))
expense = 1
total_expense = 0
while expense != 0:
#Get another expense
expense = float(raw_input('Enter the next expense or 0 to finish
$'))
#Calculate surplus
total_expense = total_expense + expense
surplus = budget - total_expense
print budget, total_expense
#Display results
print 'Your total expenses for the month $', total_expense
print 'Your surplus amount after expenses $', surplus
main()
Good luck with your course
--
Joel Goldstick
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.python.org/pipermail/tutor/attachments/20110415/1b6d83b6/attach
ment.html>
------------------------------
_______________________________________________
Tutor maillist - Tutor at python.org
http://mail.python.org/mailman/listinfo/tutor
End of Tutor Digest, Vol 86, Issue 56
*************************************
------------------------------
_______________________________________________
Tutor maillist - Tutor at python.org
http://mail.python.org/mailman/listinfo/tutor
End of Tutor Digest, Vol 86, Issue 57
*************************************
More information about the Tutor
mailing list