with open("example.txt", "r") as file:  
    content = file.read()  
    print(content)  

with open("output.txt", "w") as file:  
    file.write("Hello, this is written by Python!")  

with open("output.txt", "a") as file:  
    file.write("\nAdding a new line to the file.")  

with open("example.txt", "r") as file:  
    for line in file:  
        print(line.strip())  

students = ["Saravana", "Anjali", "Rahul"]  

with open("students_report.txt", "w") as report:  
    for student in students:  
        report.write(f"Report for {student}\n")  
        report.write("Maths: 85, Science: 90, English: 88\n\n")  

def backup_file(source, destination):
    with open(source, "r") as src:
        data = src.read()
    with open(destination, "w") as dest:
        dest.write(data)

backup_file("important_data.txt", "backup_important_data.txt")
print("Backup created successfully!")

def update_inventory(item, quantity):
    with open("inventory.txt", "a") as inventory_file:
        inventory_file.write(f"{item}: {quantity}\n")

update_inventory("Laptop", 10)
update_inventory("Smartphone", 15)
print("Inventory updated!")

def mark_attendance(student_name, date):
    with open("attendance_log.txt", "a") as log:
        log.write(f"{student_name} attended on {date}\n")

mark_attendance("Saravana", "2024-11-20")
mark_attendance("Anjali", "2024-11-20")
print("Attendance marked!")

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def greet(self):
        print(f"Hi, I am {self.name} and I am {self.age} years old.")

p1 = Person("Asha", 25)
p2 = Person("Ravi", 30)

p1.greet()  # Output: Hi, I am Asha and I am 25 years old.
p2.greet()  # Output: Hi, I am Ravi and I am 30 years old.

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def greet(self):
        print(f"Hi, I am {self.name} and I am {self.age} years old.")
        
    def checkvote(self):
        if(self.age>=18):
            print("Eligible to Vote")
        else:
            print("Not Eligible to Vote")

a1=Person("Asha",10)
a1.greet()
a1.checkvote()

class student:
    def __init__ (self,rollno,stname,m1,m2,m3,m4,m5):
        self.rollno=rollno
        self.stname=stname
        self.m1=m1
        self.m2=m2
        self.m3=m3
        self.m4=m4
        self.m5=m5

    def result(self):
        total=self.m1+self.m2+self.m3+self.m4+self.m5
        print("Total = ",total)

    def welcome(self):
        print("Welcome : ",self.stname)
        
s1=student(1001,'Raja',100,100,80,70,90)
s2=student(1002,'Kumar',100,100,80,100,90)
s1.welcome()
s1.result()
s2.welcome()
s2.result()

my_list = [10, 20, 30, "Python", True]

my_list[1]          # Access
my_list.append(40)  # Add at end
my_list.remove(20)  # Remove item
my_list[0] = 100    # Update item

my_tuple = (10, 20, 30, "Python")

my_tuple[1]        # Access
len(my_tuple)      # Length
# Cannot add or remove elements

my_set = {1, 2, 3, 4, 4, 2}
print(my_set)  # Output: {1, 2, 3, 4}

my_set.add(5)        # Add item
my_set.remove(3)     # Remove item

my_dict = {"name": "John", "age": 25, "is_student": True}

my_dict["name"]             # Access value
my_dict["age"] = 26         # Update value
my_dict["city"] = "Chennai" # Add new pair
del my_dict["is_student"]   # Delete key

for item in my_list:
    print(item)

for item in my_set:
    print(item)

for key, value in my_dict.items():
    print(key, value)


profile={"name":"kumar","age":20}
for key,value in profile.items():
    print(key,":",value)

students = ["Arun", "Beena", "Charles"]
print(students)
marks = (85, 90, 78)
print(marks)
unique_subjects = {"Math", "Science", "Math"}  
print(unique_subjects)
profile = {"name": "Kumar", "age": 20}
print(profile)

shopping_list = ["milk", "eggs", "bread"]
shopping_list.append("butter")      # Add item
shopping_list.remove("milk")        # Remove item
shopping_list[0] = "cheese" 
# Replace "eggs" with "cheese"
print(shopping_list)  
# Output: ['cheese', 'bread', 'butter']

date_of_birth = (1995, 12, 15)  # year, month, day
coordinates = (13.0827, 80.2707)  # Chennai GPS

print("Born in:", date_of_birth[0])

attendees = {"Alice", "Bob", "Alice", "David"}
print(attendees)  # Output: {'Alice', 'Bob', 'David'}

attendees.add("Eve")     # Add new person
attendees.remove("Bob")  # Remove person

print(attendees)

student = {
    "name": "Karthik",
    "age": 21,
    "marks": 88,
    "college": "ABC University"
}

# Accessing values
print(student["name"])   # Karthik
student["marks"] = 92    # Update marks
student["city"] = "Chennai"  # Add new key
print(student)

students = [
    {"name": "Arun", "age": 17, "subjects": {"Math", "Science"}},
    {"name": "Beena", "age": 18, "subjects": {"Math", "English"}},
]

for student in students:
    print(f"{student['name']} is {student['age']} years old and studies {student['subjects']}")

if condition:
    # do something

if 5 > 2:
    print("5 is greater than 2")

if condition:
    # do this if true
else:
    # do this if false

age = 16
if age >= 18:
    print("You can vote")
else:
    print("You are too young to vote")

if condition1:
    # do this
elif condition2:
    # do this
else:
    # do this if nothing above is true

score = 85
if score >= 90:
    print("Grade A")
elif score >= 80:
    print("Grade B")
else:
    print("Try harder")

while condition:
    # do this again and again

count = 1
while count <= 3:
    print("Count is", count)
    count += 1

for item in list:
    # do this for each item

for i in range(1, 4):
    print("Number:", i)

for i in range(5):
    if i == 3:
        break
    print(i)

0
1
2

for i in range(5):
    if i == 3:
        continue
    print(i)

0
1
2
4