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Midterm Exam 2 Review Fall 2003: Encoding and Decoding

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def replace(string):
newString1 = string.replace('a','@')
newString2 = newString1.replace('e','#')
newString3 = newString2.replace('i','!')
newString4 = newString3.replace('o','#')
newString5 = newString4.replace('u','^')
newString6 = newString5.replace('r','-')
newString7 = newString6.replace('s','=')
newString8 = newString7.replace('t',':')
print newString8
Yup, this'll work, but you can do it one line. How about the reverse, anyone? Mark Guzdial

def replace(string):
print string.replace("e","#").replace("i","!").replace("a","@").replace("o","#").replace("u","^").replace("r","-").replace("s","=").replace("t",":")
to reverse it you would need to switch the characters in the quotes. like this
("#","e")
what do we do when we reverse it since e and o are changed to the same thing?

Oops! My mistake! Fixed... Mark Guzdial

this may sound dumb but why do you have to put periods after the parentheses? ;P
Because you're using dot notation. Each .replace() returns a string, that you then apply the next one to. Mark Guzdial

Great problem! Why? It's one of the few things that seems easy about this review.


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