# Basic file writing
with open('output.txt', 'w') as file:
    file.write("Hello, Python!")
    file.write("\nThis is a new line.")

# Basic file writing
filename = 'output.txt'

# Write method
with open(filename, 'w') as file:
    file.write("First line\n")
    file.write("Second line\n")

# Writing multiple lines at once
lines = ["Line 1\n", "Line 2\n", "Line 3\n"]
with open(filename, 'w') as file:
    file.writelines(lines)

print("Basic writing completed")

# Using print function for file writing
filename = 'print_output.txt'

with open(filename, 'w') as file:
    print("Hello from print!", file=file)
    print("Another line", file=file)
    print("Numbers:", 1, 2, 3, file=file)

print("Print-based writing completed")

# Appending to existing file
filename = 'append_test.txt'

# First write some content
with open(filename, 'w') as file:
    file.write("Initial content\n")

# Then append more content
with open(filename, 'a') as file:
    file.write("Appended line\n")

# Writing with formatting
data = {'name': 'Alice', 'age': 25}
with open(filename, 'a') as file:
    file.write(f"Name: {data['name']}\n")
    file.write(f"Age: {data['age']}\n")

print("Appending and formatting completed")

# Safe file writing with error handling
def safe_write_file(filename, content):
    try:
        with open(filename, 'w', encoding='utf-8') as file:
            file.write(content)
        print(f"Successfully wrote to {filename}")
        return True
    except PermissionError:
        print(f"Permission denied: {filename}")
        return False
    except Exception as e:
        print(f"Error writing file: {e}")
        return False

# Test the function
result = safe_write_file('test.txt', "Test content")
print(f"Write operation successful: {result}")

# Writing structured data as formatted text
students = [
    {'name': 'Alice', 'grade': 'A'},
    {'name': 'Bob', 'grade': 'B'},
    {'name': 'Charlie', 'grade': 'C'}
]

with open('students.txt', 'w') as file:
    file.write("Student Report\n")
    file.write("=" * 20 + "\n")
    for student in students:
        file.write(f"{student['name']}: {student['grade']}\n")

print("Student report written successfully")

import os
import shutil
from datetime import datetime

# Backup existing file before writing
def write_with_backup(filename, content):
    if os.path.exists(filename):
        backup_name = f"{filename}.backup"
        shutil.copy(filename, backup_name)
        print(f"Created backup: {backup_name}")
    
    with open(filename, 'w') as file:
        file.write(content)

# Log writing function
def write_log(message, filename='app.log'):
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    log_entry = f"[{timestamp}] {message}\n"
    
    with open(filename, 'a') as file:
        file.write(log_entry)

# Example usage
write_with_backup('important.txt', "New content")
write_log("Application started")
write_log("User logged in")