14.8-Write-Append—Make

Instructions

In the make tasks, students use the skills learned in the earlier stages of PRIMM to create their own program based on a description of what it should do.

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

Learning Objectives/Goals

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()`

In this unit you will learn about

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()

Help!! My code doesen’t work!

Not including the file extension (.txt)
Consistency between file variable used with open and in the loop.
Wrong case in filename. (my_file vs my_File)
Not indenting inside loops.
Not closing file once task is completed.

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14.8-Write-Append—Make

Instructions

Learning Objectives/Goals

In this unit you will learn about

Help!! My code doesen’t work!

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