lists and reading from file comma separated elements - python-3.x

Question

Here is my code
#course registration
list_courses=[]
for line in open("courses.txt",'r').readlines():
list_courses.append(line.strip())
print ("Gathering course information from file: \n",list_courses)
close("courses.txt")
list_student=[]
for line in open("students.txt",'r').readlines():
list_student.append(line.strip())
print("Here is student info: \n",list_student)
close("students.txt")
this is giving me errors when I try to close the files. How do I close, I am basically reading contents of file and storing them in a list. Now later on want to close the open files.There I get error.
I edited the code as per suggestions below.
The new code is
list_courses=[]
with open("courses.txt",'r') as myfile1:
list_courses=myfile1.readlines()
list_courses=[x.strip() for x in list_courses]
print ("Gathering course information from file: \n",list_courses)
list_student=[]
with open("students.txt",'r') as myfile1:
list_student=myfile1.readlines()
list_student=[x.strip() for x in list_student]
print("Here is student info: \n",list_student)
The information in courses.txt is
cs101,C programming
cs102,Digital logic and design
cs103,Electrical engineering
cs231,IT networks
cs232,IT Workshop
cs233,IT programming
cs301,Compilers and automata
cs302,Operating Systems
cs303,Networks
cs401,Game Theory
cs402,Systems Programming
cs403,Automata
ec101,Digitization
ec102,Analog cicuit design
ec103,IP Telephony
ec201,Wireless Network
ec202,Microwave engineering
ec203,Antenna
ec301,Maths2
ec302,Theory of Circuits
ec303,PCB design
ec401,PLC programming
ec402,Scada
ec403,VLSI
When I run the code I get output
Gathering course information from file:
['cs101,C programming', 'cs102,Digital logic and design', 'cs103,Electrical engineering', 'cs231,IT networks', 'cs232,IT Workshop', 'cs233,IT programming', 'cs301,Compilers and automata', 'cs302,Operating Systems', 'cs303,Networks', 'cs401,Game Theory', 'cs402,Systems Programming', 'cs403,Automata', 'ec101,Digitization', 'ec102,Analog cicuit design', 'ec103,IP Telephony', 'ec201,Wireless Network', 'ec202,Microwave engineering', 'ec203,Antenna', 'ec301,Maths2', 'ec302,Theory of Circuits', 'ec303,PCB design', 'ec401,PLC programming', 'ec402,Scada', 'ec403,VLSI']
Instead of it what I want is the input cs101 from the first line of courses.txt to go in list_courses[0] and list_courses[1] to have c programming i.e.
list_courses[0]=cs101
list_courses[1]=C programming
So I tried methods where programe have taken a line and read the line stored that line as an element of list but there is a comma which separates two elements in courses.txt and comma separated values should be separate list elements.

Answer 1

This will work for you:
students=[]
subject=[]
with open("students.txt","r") as f:
for line in f.readlines():
eachl=line.split(",")
students.append(eachl[0])
subject.append(eachl[1][:-1])
you will get two lists containing student names and another one with subjects:
students list will look like:
['cs101', 'cs102', 'cs103', 'cs231', 'cs232', 'cs233', 'cs301', 'cs302', 'cs303', 'cs401', 'cs402', 'cs403', 'ec101', 'ec102', 'ec103', 'ec201', 'ec202', 'ec203', 'ec301', 'ec302', 'ec303', 'ec401', 'ec402', 'ec40`3]
subjects list will look like:
['C programming', 'Digital logic and design', 'Electrical engineering', 'IT networks', 'IT Workshop', 'IT programming', 'Compilers and automata', 'Operating Systems', 'Networks', 'Game Theory', 'Systems Programming', 'Automata', 'Digitization', 'Analog cicuit design', 'IP Telephony', 'Wireless Network', 'Microwave engineering', 'Antenna', 'Maths2', 'Theory of Circuits', 'PCB design', 'PLC programming', 'Scada', 'VLSI']

Answer 2

Why don’t you try
students = []
courses = []
open(“courses.txt”, “r”) as f
for line in f.readlines()
a, b = line.split(“,”)
students.append(a)
courses.append(b[:-1])
f.close()
This will produce two lists students and courses