13.5.1. Opening and Reading

Try these first

1. 1.

   What function is used to open a file in Python?

   Hint

   Think of the basic operation needed to access files.

2. 2.

   Which mode would you use to read from a file?

   Hint

   Consider what you would do if you want to see content.

3. 3.

   What does the open() function do?

   • Opens an existing file
   • Creates a new file
   • Both A and B

   Hint

   Think about the versatility of file operations.

4. 4.

   True or False: It is unnecessary to close files that have been opened.

   • True
   • False

   Hint

   Consider what happens when resources are not managed.

5. 5.

   Write a Python program that opens a file, reads its content line by line, and prints each line with its line number.

   Hint

   Don't forget to use enumeration to track line numbers!

6. 6.

   Create a function that checks if a file exists before attempting to open it and reads its contents.

   Hint

   Utilize the os module for file existence checking.