how to see if string is only numbers and letters python

Python homework part.2

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This time we only had four exercises dealing with the reading, writing in, overwriting and searching documents with python.

I managed to complete all of these quite quickly and only found a challenge in the exercise 3/4 which you can see below. I'll ad some screenshots to these too from here on.

1/4

Read a document called faktat.txt and print what it said.

faktatpy