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Errata

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To the second printing of the first edition:

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In Question 11 of Chapter 4, for "BUII YI CENU" read "DAHHK SKNHZ".

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In the answer to Chapter 4, Question 11, for "ABCDEFGHIJKLMNOPQRSTUVQXYZ" read "ABCDEFGHIJKLMNOPQRSTUVWXYZ".

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In the answer to Chapter 4, Question 1, for "'Bacon' < 'Bacon'" read "'Bacon' < 'bacon'".

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On page 28: For "For example, that len(range(a, b)) == a - b" should read "For example, that len(range(a, b)) == b - a".

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To the first printing of the first edition, October 2020:

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Some unidiomatic uses of == and != for comparisons with None have been replaced by the use of in and not in. This affects the functions found_values and not_none, and Project 2. The textual changes are minimal.

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The book has now been updated. A customer may request an updated PDF by using the contact form on this website.

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