Problem Statement: A program needs to log user actions. It should create a new log file if one doesn't exist, write an initial entry, and then append subsequent entries without overwriting previous ones.

Problem Statement: A game needs to save a player's character profile (a complex dictionary containing lists and strings) to a text file so it can be loaded later.

Problem Statement: Compare the syntax required to securely open, read, and close a file named data.txt line by line in C++ and Python.

Problem Statement: You have an input file server.log. Write a complete Python script to count the number of lines containing the word "ERROR" and write the total count to a new file named summary.txt.