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38 Chapter 4. Case study: interface design
You can get a solution from http: // thinkpython2. com/ code/ letters. py ; it also requires
http: // thinkpython2. com/ code/ polygon. py .
Exercise 4.5. Read about spirals at http: // en. wikipedia. org/ wiki/ Spiral ; then write
a program that draws an Archimedian spiral (or one of the other kinds). Solution: http:
// thinkpython2. com/ code/ spiral. py .
