[Tutor] Request for help with code

[Bob Gailer]

On Nov 6, 2018 4:51 PM, "Joseph Gulizia" <joseph.gulizia at 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

Your code came through with all of the indentation removed. Please be sure
to send plain text. We could guess at the indentation but we might get it
wrong.

With the indentation corrected the code you supplied does not agree with
the execution. Note the difference between integer and interger.

You also did not make any request. Please in the future tell us what you
want from us.

The fact that the program keeps asking for integer 1 suggest that count is
not being incremented. This would also explain why the loop never ends.