Lesson 2 of 7

Write and read files

open(path, "w") opens a file for writing; the with block guarantees it gets closed, even on error — it's the standard idiom.

Without a mode argument, open(path) reads: f.read() returns the whole content as a string.

with open("log.txt", "w") as f:
    f.write("line 1\n")

with open("log.txt") as f:
    print(f.read())

🎯 Exercise

Write the text alpha\nbeta\n (two lines) into the file notes.txt, then read it back into the variable content and print it.

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