Writing files

301.15 File Handling Techniques

File Handling Techniques — Note 3 of 4

Append or overwrite content.

What you need to know

Use .write() to save text to a file. Remember to add \n for new lines — write() does not add them automatically. Use "w" to start fresh or "a" to add to existing content.

What to know

.write(text) saves text to the file
Does NOT auto-add newlines — use \n explicitly
"w" mode creates/overwrites; "a" mode appends
Write strings only — cast numbers with str() first

Code examples

Writing to a file

python

scores = [85, 92, 78]
with open("scores.txt", "w") as f:
    for s in scores:
        f.write(str(s) + "\n")

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Specification notes for programming are in Paper 2.