[Tutor] counting number of inputs
I am trying to count the number of times a positive number is entered from the user. But, the program must stop after 5 user inputs or a negative number. Can anyone help. Rick ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Fw: counting number of inputs
This is what I have so far. Can anyone
help?
> number1 =
int(raw_input("Run number 1 (-1 to end) : "))> number2 =
int(raw_input("Run number 2 (-1 to end) : "))> number3 =
int(raw_input("Run number 3 (-1 to end) : "))> number4 =
int(raw_input("Run number 4 (-1 to end) : "))> number5 =
int(raw_input("Run number 5 (-1 to end) : "))> > > # The
following will sum the numbers and then print the answer> sum = number1 +
number2 + number3 + number4 + number5> print> print "The total
number of parts produced was:", sum,"."> > I need this to ask the
user to enter their number per each run. That is why> I have 5
different input numbers. I need this break if a -1 is entered.>
Would I use "if-else" to break this if -1 is entered? I need to be able
to> count the number of lines entered. I also need to print the run
number with the highest and lowest input number.> > Thanks, I'm
lost> Rick>
- Original Message -
From: MICHELLE
EVANS
To: tutor@python.org
Sent: Tuesday, May 02, 2006 7:25 PM
Subject: counting number of inputs
I am trying to count the number of times a positive
number is entered from the user. But, the program must stop after 5 user
inputs or a negative number.
Can anyone help.
Rick
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] counting number of inputs (EARLIER VERSION SENT ACCIDENTLY)
OK, I've tried a different approach to this.
How do I get this to stop by using -1?
I do not want this to print until either 5 inputs have been entered or -1
has been entered. See below:
# Add number of per hour
numbers = []
stop = None
while stop != "-1":
number = int(raw_input("Run number(-1 to end) : "))
numbers.append(number)
print
for number in numbers:
print number
- Original Message -
From: "Python" <[EMAIL PROTECTED]>
To: "MICHELLE EVANS" <[EMAIL PROTECTED]>
Cc: "Tutor Python"
Sent: Wednesday, May 03, 2006 12:18 PM
Subject: Re: [Tutor] counting number of inputs (EARLIER VERSION SENT
ACCIDENTLY)
> (Tip: Best to use reply-to-all when responding to an email on the list)
> On Tue, 2006-05-02 at 21:34 -0400, MICHELLE EVANS wrote:
> > number1 = int(raw_input("Run number 1 (-1 to end) : "))
> > number2 = int(raw_input("Run number 2 (-1 to end) : "))
> > number3 = int(raw_input("Run number 3 (-1 to end) : "))
> > number4 = int(raw_input("Run number 4 (-1 to end) : "))
> > number5 = int(raw_input("Run number 5 (-1 to end) : "))
> Good. You collect the string from raw_input and convert it to an
> integer.
>
> This will prompt for 5 inputs, but it is missing any logic to actually
> break if -1 is entered. With a language like BASIC, you could stick in
> tests sort of like:
> if number1 == -1 goto done:
> BUT Python does not have a goto. So we actually need some "flow
> control" around the block of code where you collect inputs.
>
> while blocks process an indefinite number of times while a test
> condition is True.
>
> for blocks iterate through a sequence until they reach the end. By
> providing a sequence with the correct count, you can repeat the block
> the correct number of times. The range (and xrange for big sequences)
> functions provide a sequence of integers that can be used conveniently
> with for.
>
> The easiest way to fix your code above would be something like:
> ask_for_number = True
> while ask_for_number:
> number1 =
> if number1 == -1: break
> ...
> number5 = ...
> ask_for_number = False
>
> HOWEVER, that is not a good approach in the long run.
>
> A better approach is to have a single container to hold all of the
> inputs. For this, Python provides lists. Rather than have 5 separate
> variables, use a single list variable to hold all of the inputs. Then
> use a "for block" to ask for the input and put the result into the list.
> You already know how to convert the input from a string to a number.
>
> If you have trouble figuring out lists and for blocks, ask for help.
>
> (Sorry about the extra email. I forgot and used ad editor hot-key combo
> in my email program which sent the email.)
>
>
> >
> >
> > # The following will sum the numbers and then print the answer
> > sum = number1 + number2 + number3 + number4 + number5
> > print
> > print "The total number of parts produced was:", sum,"."
> >
> > I need this to ask the user to enter their number per each run. That is
why
> > I have 5 different input numbers. I need this break if a -1 is entered.
> > Would I use "if-else" to break this if -1 is entered? I need to be able
to
> > count the number of lines entered.
> >
> > Thanks
> > Rick
> >
> >
> > - Original Message -
> > From: "Python" <[EMAIL PROTECTED]>
> > To: "MICHELLE EVANS" <[EMAIL PROTECTED]>
> > Cc: "Tutor Python"
> > Sent: Tuesday, May 02, 2006 7:56 PM
> > Subject: Re: [Tutor] counting number of inputs
> >
> >
> > > On Tue, 2006-05-02 at 19:25 -0400, MICHELLE EVANS wrote:
> > > > I am trying to count the number of times a positive number is
entered
> > > > from the user. But, the program must stop after 5 user inputs or a
> > > > negative number.
> > > >
> > > > Can anyone help.
> > > Yes, but you need to help yourself also.
> > >
> > > Do you know how to get input from the user?
> > > Do you know how to count things in Python?
> > > Do you know how to test a number to see if it is positive or negative?
> > >
> > > Why don't you post your code for any part of this problem and explain
> > > how it is supposed to work and where you are having difficulty. If
> > > necessary, review some of the tutorials to get some pointers on
writing
> > > Python programs.
> > >
> > > We're happy to help you learn, but do not want to simply write your
> > > program for you.
> > >
> > > > Rick
> > > > ___
> > > > Tutor maillist - Tutor@python.org
> > > > http://mail.python.org/mailman/listinfo/tutor
> > > --
> > > Lloyd Kvam
> > > Venix Corp
> > >
> > >
> >
> --
> Lloyd Kvam
> Venix Corp
>
>
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] counting number of inputs (EARLIER VERSION SENT ACCIDENTLY)
This is exactly what I am trying to do. I am so confused with trying to
write this. I am not very familiar with any of the functions. I keep
reading my book and reading my book, and none of it seems to make sense
anymore. I can write extremely simple functions, but when I need to use
more than one in a code, I'm lost!
Thanks
- Original Message -
From: "Marc Poulin" <[EMAIL PROTECTED]>
To:
Sent: Thursday, May 04, 2006 12:08 AM
Subject: Re: [Tutor] counting number of inputs (EARLIER VERSION SENT
ACCIDENTLY)
>
> Michelle:
>
> Are you familiar with writing functions?
> Here I've created a function named getInputs.
>
> I've also created a few test cases to verify that (a)
> my understanding of the problem is correct, and (b) my
> solution is correct.
>
> It's important to think about how your program is
> supposed to behave in different situations. Do you
> think these 3 tests are enough to prove that the code
> is correct?
>
> #
> ## start of code ##
> #
> def getInputs():
> """
> Description:
>Collect numbers entered by the user (up to a
> maximum of 5 values) and
>store them in the listOfValues.
>
>Stop collecting numbers if the user enters -1
> or if 5 numbers have been collected.
>
>If the user entered -1, the -1 is NOT returned
> as part of the list.
> """
> listOfValues = [] ## this list holds the values
> entered by the user
>
> for i in range(5):
> newValue = int(raw_input('Enter a number [-1
> to exit]:'))
> if newValue == -1:
> # Return right now with whatever is
> currently in the list.
> return listOfValues
> else:
> # Add this new value to the list and keep
> looping.
> listOfValues.append(newValue)
>
> ## If we got this far, it means the user did not
> enter a -1 so
> ## the list contains 5 values.
> return listOfValues
>
> """
> Here are a few test cases to verify the logic of my
> code.
>
> Test Case 1:
>INPUTS:
> first entered value: -1
>RESULT:
> function returns empty list
>
> Test Case 2:
>INPUTS:
> first entered value: 1
> second entered value: 2
> third entered value: -1
>RESULT:
> returned list contains [1,2]
>
> Test Case 3:
>INPUTS:
> first entered value: 1
> second entered value: 2
> third entered value: 3
> fourth entered value: 4
> fifth entered value: 5
>RESULT:
> returned list contains [1,2,3,4,5]
> """
> if __name__ == "__main__":
> print getInputs()
>
> ###
> ## end of code ##
> ###
>
>
> --- Python <[EMAIL PROTECTED]> wrote:
>
> > On Wed, 2006-05-03 at 15:33 -0400, MICHELLE EVANS
> > wrote:
> > > OK, I've tried a different approach to this.
> > > How do I get this to stop by using -1?
> > > I do not want this to print until either 5 inputs
> > have been entered or -1
> > > has been entered. See below:
> > >
> >
> > use a "for block" rather than a "while block" to
> > have a normal limit of
> > 5 repetitions:
> >
> > for x in range(5):
> >
> > will repeat 5 times with x running from 0 to 4.
> > x is ignored - unless some use for it does turn up.
> >
> > the break statement allows you to terminate a block,
> > so
> >
> > if number == -1: break
> >
> > will end the for block.
> >
> >
> > Now, one of the cute features in Python is the else
> > clause that goes
> > with the for and while blocks. The else block is
> > executed when there is
> > no break. So the skeleton for your program can look
> > something like
> >
> > for x in range(5):
> > # get inputs and break on -1
> > else:
> > # no break so just process the inputs
> >
> > Good luck.
> >
> > > # Add number of per hour
> > > numbers = []
> > > stop = None
> > > while stop != "-1":
> > > number = int(raw_input("Run number(-1 to end)
> > : "))
> > > numbers.append(number)
> > > print
> > > for number in numbers:
> > > print number
> > >
> > >
> > >
> > >
> > > - Original Message -
> > > From: "Python" <[EMAIL PROTECTED]>
>
