[BangPypers] Fwd: Please help with this code

[Sayantan]

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 at dev-machine]

On Sun, 19 Aug 2018, ankur gupta wrote:

> ---------- Forwarded message ---------
> From: ankur gupta <ankurimt01 at gmail.com>
> Date: Sun, Aug 19, 2018 at 3:07 PM
> Subject: Please help with this code
> To: <bangpypers at 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 at 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
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