Funny.... using a text editor....and showed indented in my browser. Won't
bother the list again.
On Tue, Nov 6, 2018, 17:32 Joel Goldstick <joel.goldst...@gmail.com wrote:
> On Tue, Nov 6, 2018 at 6:17 PM Joseph Gulizia <joseph.guli...@gmail.com>
> wrote:
> >
> > Apologies for earlier errors when asking for help -- I am hopeful that
> this
> > shortened post displays properly:
> > The code is Python 2... trying to solve why loop doesn't stop at given
> > number of integers....if I input request for 3 integers....it keeps
> asking
> > for integer1...and keeps asking for input,,,so count isn't
> > working....trying to figure out why. Pointers please.
> >
> > import sys
> >
> > target_int=raw_input("How many integers?")
> >
> > try:
> > target_int=int(target_int)
> > except ValueError:
> > sys.exit("You must enter an integer")
> >
> > # creates a collection (list) called ints
> >
> > ints=list()
> >
> > # keeps track of number of integers
> >
> > count=0
> >
> > # Keep asking for an integer until we have the required number
> >
> > while count<target_int:
> > new_int=raw_input("Please enter integer{0}:".format(count+1))
> > isint=False
> > try:
> > new_int=int(new_int)
> > except:
> > print("You must enter an integer")
> > -----------------
> >
> >
> > On Tue, Nov 6, 2018 at 3:50 PM Joseph Gulizia <joseph.guli...@gmail.com>
> > wrote:
> >
> > > I'm using the bookazine "The Python Book" First Edition on pages
> 13-14 it
> > > gives the code (listed further below).
> > >
> > > It asks for user to state a given number of integers (for example
> > > 4)...then user enters integers. It doesn't stop seeking input after
> the
> > > number requested thereby creating an infinite loop.
> > >
> > > -----------------------------
> > > CODE
> > > -----------------------------
> > >
> > > # Python Book Page_13.py
> > > # Joe G.
> > >
> > > # several comment lines explain the code below it.
> > > # Re-typing is good practice
> > >
> > > # We're going to write a program that will ask the user to input an
> > > arbitrary
> > > # number of intergers, store them in a collection, and then demonstrate
> > > how the
> > > # collection would be used in various control structures.
> > >
> > > # Used for the sys.exit function
> > > import sys
> > > # Requests number of intergers
> > > target_int=raw_input("How many intergers?")
> > > # By now, the variable target_int contains a string representtion of
> > > # whatever the user typed. We need to try and convert that to an
> interger
> > > but
> > > # be ready to # deal with the error if it's not. Otherwise the program
> > > will
> > > # crash
> > > # Begin the error check
> > > try:
> > > target_int=int(target_int)
> > > except ValueError:
> > > sys.exit("You must enter an interger")
> > > # creates a collection (list) called ints
> > > ints=list()
> > > # keeps track of number of intergers
> > > count=0
> > > # Keep asking for an interger until we have the required number
> > > while count<target_int:
> > > new_int=raw_input("Please enter interger{0}:".format(count+1))
> > > isint=False
> > > try:
> > > new_int=int(new_int)
> > > except:
> > > print("You must enter an interger")
> > > # Only carry on if we have an interger. If not, we'll loop again
> > > # Notice below I use == which is different from =. The single equals
> sign
> > > is an
> > > # assignment operator whereas the double equals sign is a comparison
> > > operator. I would
> > > # call it a married eguals sign....but whenever single is mentioned I
> have
> > > to mention marriage.
> > >
> > > if isint==True:
> > > # Add the interger to the collection
> > > ints.append(new_int)
> > > # Increment the count by 1
> > > count+=1
> > > # print statement ("using a for loop")
> > > print("Using a for loop")
> > > for value in ints:
> > > print(str(value))
> > > # Or with a while loop:
> > > print("Using a while loop")
> > > # We already have the total above, but knowing the len function is very
> > > # useful.
> > > total = len(ints)
> > > count = 0
> > > while count < total:
> > > print(str(ints[count]))
> > > count +=1
> > >
> > > count = 0
> > > while count < total:
> > > print(str(ints[count]))
> > > count += 1
> > >
> > > -------------------------------
> > > END OF CODE
> > > -------------------------------
> > > Sample output:
> > >
> > > How many integers?3
> > > Please enter integer1:1
> > > Please enter integer1:2
> > > Please enter integer1:3
> > > Please enter integer1:a
> > > You must enter an integer
> > > Please enter integer1:4
> > > Please enter integer1:5
> > > Please enter integer1:6
> > > Please enter integer1:b
> > > You must enter an integer
> > > Please enter integer1:
> > > (Keeps Looping)
> > >
> > > Thanks in advance
> > > Joe
> > >
> > _______________________________________________
> > Tutor maillist - Tutor@python.org
> > To unsubscribe or change subscription options:
> > https://mail.python.org/mailman/listinfo/tutor
>
> still not indented.. sorry.. figure that out
>
> --
> Joel Goldstick
> http://joelgoldstick.com/blog
> http://cc-baseballstats.info/stats/birthdays
>
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