13.2.2. File Modes

Try these first

1. 1.

   What does the 'r' mode allow you to do with a file?

   Hint

   Think about access rights.

2. 2.

   What happens when you open a file in 'w' mode?

   Hint

   What does 'w' stand for?

3. 3.

   What mode would you use to read a file without modifying it?

   • r
   • w
   • a

   Hint

   Think about what you can do without changing the file.

4. 4.

   True or False: The 'w' mode will preserve the file content if it already exists.

   • True
   • False

   Hint

   What happens to the old data?

5. 5.

   You have a file that logs errors in your application. Write a Python function that opens this file in 'a' mode to add new error log entries. Explain how you ensure that existing entries remain intact.

   Hint

   Think about how you can open the file so everything stays there.

6. 6.

   Design a program that reads data from a binary file using 'rb' mode. Explain what will happen if you unintentionally open the file in 'r' mode instead.

   Hint

   Consider the type of data you're dealing with.