Hey,
You need to use std.append(STUDENT(roll,name,present,absent))
Since you have just initialized the list named std, there is no index
available in the begining.
Thanks,
Prince
On Sun, 19 Aug 2018, 16:00 Sayantan, <skb655...@gmail.com> wrote:
> Hello Ankur,
>
> A few things before we take the program in context:
>
> 1. Always paste the code in a page(pastebin/paste.ubuntu.com & the like)
> so that the indentation remains proper. This will help the members to
> easily figure out the issue with the code.
>
> 2. Always refer to the error message provided by the interpreter before
> you approach an audience. You, may have in this case, already done that.
> This is just a suggestion.
>
> Now, back to the code, the error is because there is no
> definition/information about 'std' in the code. The interpreter doesn't
> know in this case the type of 'std' itself. As a result, when you are
> trying to push a value into the std[i] variable/memory(a collection is
> what you have in mind), the interpreter is spewing this error message.
>
> Defining std = [] or the specific collection type(dict/tuple) would
> resolve this error.
>
> --
> Sayantan Bhattacharya
> [Sent from pine@dev-machine]
>
> On Sun, 19 Aug 2018, ankur gupta wrote:
>
> > ---------- Forwarded message ---------
> > From: ankur gupta <ankurim...@gmail.com>
> > Date: Sun, Aug 19, 2018 at 3:07 PM
> > Subject: Please help with this code
> > To: <bangpypers@python.org>
> >
> >
> > Dear Sir
> > I am new to python programing, I am getting error while executing this
> > code. I want to generate multiple instance using while loop to store data
> > following is the code
> >
> > class STUDENT:
> > no_of_students=0
> > def __init__(self,roll,name,present,absent):
> > self.roll=roll
> > self.name=name
> > self.present=present
> > self.absent=absent
> > STUDENT.no_of_students+=1
> >
> > n='Y'
> > i=0
> > while n=='Y' or n=='y':
> > roll=input("ENTER NAME: ")
> > name=input("ENTER ROLL NO:")
> > present=input("ENTER NO. OF DAYS PRESENT:")
> > absent=input("ENTER NO. OF DAYS ABSENT:")
> > std[i] = STUDENT(roll,name,present,absent)
> > n=input("ENTER MORE RECORDS (Y/y)?...")
> > i+1
> >
> >
> > GETTING THIS ERROR
> >
> > ankur@ankur-Lenovo-G50-80:~/PycharmProjects$ cd
> /home/ankur/PycharmProjects
> > ; env "PYTHONIOENCODING=UTF-8" "PYTHO
> > NUNBUFFERED=1" /home/ankur/anaconda3/bin/python
> > /home/ankur/.vscode/extensions/ms-python.python-2018.4.0/pythonFi
> > les/PythonTools/visualstudio_py_launcher.py /home/ankur/PycharmProjects
> > 42323 34806ad9-833a-4524-8cd6-18ca4aa74f1
> > 4 RedirectOutput,RedirectOutput "/home/ankur/PycharmProjects/STUDENTS
> > ATTENDANCE.PY"
> > ENTER NAME: ANKUR
> > ENTER ROLL NO:1
> > ENTER NO. OF DAYS PRESENT:12
> > ENTER NO. OF DAYS ABSENT:8
> > Traceback (most recent call last):
> > File "/home/ankur/PycharmProjects/STUDENTS ATTENDANCE.PY", line 17, in
> > <module>
> > std[i] = STUDENT(roll,name,present,absent)
> > NameError: name 'std' is not defined
> >
> >
> > THANKS IN ADVANCE
> > ANKUR GUPTA
> > _______________________________________________
> > BangPypers mailing list
> > BangPypers@python.org
> > https://mail.python.org/mailman/listinfo/bangpypers
> >
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