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POHexadecimal to Binary program - Python
 

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  1. POHexadecimal to Binary program - Python
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    <p>I am doing an exam paper for revision. It's not a particular question I want help with, but I am unsure to why the program is outputting incorrectly when certain data is entered.</p> <pre><code>def Binary(Hex): Result = '' ErrorFound = False BinaryEquivalent = '' EmptyInput="" for ThisHexDigit in Hex: if ThisHexDigit in ['1','2','3','4','5','6','7','8','9','0','A','B','C','D','E','F']: if ThisHexDigit == '0': BinaryEquivalent = '0' elif ThisHexDigit == '1': BinaryEquivalent = '1' elif ThisHexDigit == '2': BinaryEquivalent = '2' elif ThisHexDigit == '3': BinaryEquivalent = '3' elif ThisHexDigit == '4': BinaryEquivalent = '4' elif ThisHexDigit == '5': BinaryEquivalent = '5' elif ThisHexDigit == '6': BinaryEquivalent = '6' elif ThisHexDigit == '7': BinaryEquivalent = '7' elif ThisHexDigit == '8': BinaryEquivalent = '8' elif ThisHexDigit == '9': BinaryEquivalent = '9' elif ThisHexDigit == 'A': BinaryEquivalent = '10' elif ThisHexDigit == 'B': BinaryEquivalent = '11' elif ThisHexDigit == 'C': BinaryEquivalent = '12' elif ThisHexDigit == 'D': BinaryEquivalent = '13' elif ThisHexDigit == 'E': BinaryEquivalent = '14' elif ThisHexDigit == 'F': BinaryEquivalent = '15' Result = Result + BinaryEquivalent elif ErrorFound == True: print('You have made a mistake') elif Hex==EmptyInput: print('Empty input, try again.') return Result </code></pre> <p>Yes, I know this is an over-complicated piece of code but it is in the exam paper so I have to use it. It came like that, except that all the BinaryEquivalent strings were <code>BinaryEquivalent = ''</code> instead of having numbers inside.</p> <p>The problem is when I enter two characters when the program is displaying. For example, entering "BBB" will output 11, as will 'BBBBBB'. </p>
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    1. COis '15' binary?
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    2. CO"it is in the exam paper"? Everything about this code is wrongly conceived.
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      1. USKarl Knechtel
    3. COHow about `try: BinaryEquivalent=str(int(ThisHexDigit, 16)) catch ValueError: print "You have made a mistake."` or something similar? (you have to add newlines but a comment cannot handle code formatting properly). Your code is ugly on so many frontiers that I suggest a rewrite.
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