python append text file which is already in use code example

Example 1: python - save file

def save_to_file(content, filename):
    with open(filename, 'w') as file:
        file.write(content)

import file_operations
file_operations.save_to_file('my_content', 'data.txt')

Example 2: python create file

f= open("guru99.txt","w+")