14.7-Write-Append—Modify

Instructions

In the modify tasks, students adapt the example code to start to create code of their own.

Make sure that the students add comments to explain what the code does.

Concept	Explanation	Code	Example
Read	Python can only read contents of the file. It cannot modify any information in the file.	`r`	`my_file = open("test.txt", "r")`
Write	When python opens the file, it deletes everything inside. Then it can write new information to the file. All old information is lost.	`w`	`my_file = open("test.txt", "w")`
Append	Python can add text to the end of the file. This keeps all old information while allowing new information to be added.	`a`	`my_file = open("test.txt", "a")`
Close	When done working with a file, the file must be closed.	`close()`	`my_file.close()`

Files can be opened in either read, write, or append mode.

When working with files, the file is opened and stored in a variable.

my_file = open("test.txt", "r")

Then, once done with the file, it must be closed.

my_file.close()