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
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