13.5.3. File Context Manager

Try these first

1. 1.

   What keyword is used in Python to create a context manager for file handling?

   Hint

   Think about managing resources automatically.

2. 2.

   What happens if an exception occurs in a context block?

   Hint

   Consider how exceptions are handled in clean coding practices.

3. 3.

   What does the with statement ensure when opening a file?

   • The file is opened in read-only mode
   • The file will be closed automatically
   • The file can only be written to

   Hint

   Think about resource management.

4. 4.

   True or False: A context manager can help prevent memory leaks.

   • True
   • False

   Hint

   Consider what happens when resources are not managed properly.

5. 5.

   Create a context manager that reads from a file and counts the number of lines, returning that number. Make sure to handle exceptions where necessary.

   Hint

   Remember to use the context manager for file operations.

6. 6.

   Design a function that uses a context manager to write a list of strings to a file. If the file exists, overwrite it. Include error handling.

   Hint

   Utilize 'with' for safe file writing.