Hacking Secret Ciphers with Python
Chapter 5 – The Reverse Cipher 61 Remember that for the “less than or equal to” and “greater than or equal to” operators, ...
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Just remember that every expressio ...
Chapter 5 – The Reverse Cipher 63 On line 5, the amount of indentation has decreased to 4, so we know that the block on the prev ...
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“Growing” a String Remember on lin ...
Chapter 5 – The Reverse Cipher 65 what causes translated to hold the reverse of the string in the message. When i is finally set ...
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30 o .daed era meht fo o 29 w .dae ...
Chapter 5 – The Reverse Cipher 67 Tracing Through the Program, Step by Step The previous explanations have gone through what eac ...
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evaluates to True, the program exe ...
Chapter 5 – The Reverse Cipher 69 Practice Exercises, Chapter 5, Section A Practice exercises can be found at http://invpy.com/h ...
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THE CAESAR CIPHER Topics Covered I ...
Chapter 6 – The Caesar Cipher 71 are the integers from 0 to 25. Even if a cryptanalyst knows that the Caesar cipher was used, th ...
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LETTERS or less than 0 if num & ...
Chapter 6 – The Caesar Cipher 73 THIS IS MY SECRET MESSAGE. If you see this error message when running the program: Traceback (m ...
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The import statement is made up of ...
Chapter 6 – The Caesar Cipher 75 Like all conventions, we don’t have to follow it. But doing it this way makes it easier for oth ...
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Because the upper() method returns ...
Chapter 6 – The Caesar Cipher 77 The for loop is very good at looping over a string or list of values (we will learn about lists ...
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... print('The letter is ' + lette ...
Chapter 6 – The Caesar Cipher 79 'rosebud' is True, then the execution jumps inside of the following block to print out 'Access ...
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print('You have a lot of eggs. G ...
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