Mathematics for the Digital Age
           and
  Programming in Python
        2nd Edition


            Errata


       Hardcover edition
       =================

p. 4, Figure 1-2

        One stray square in Range

p. 12, Example 2

        Let p(n) be the highest power of 2 that divides n.  That is, p(n) is the largest k
        ...
        try every value of 2^k under n

  should be:

        Let p(n) be the largest k
        ...
        try every value of 2^k less than or equal to n

p. 32, middle

       return n*(n+1)/2

  should be:

       return n*(n+1)//2

p. 66, Figure 4.2:

        The numbers and displacements should be 1, 1/2, 1/3, ...
        where the length of a brick is 2.  See
        http://www.skylit.com/python/Figure4-2Correction.gif.

p. 112, #10, last paragraph:

        raw_input

  should be:

        input

p. 113, #12 and solution:

        isMersenne

  should be:

        isMersennePrime


p. 157, middle:

        "but tuples have no methods at all"

        That was true in Python 2.  In Python 3 a tuple has methods count and index.


p. 163, paragraph before Example 4:

        use print >>f, s

  should be:

        use print(s, file=f)

p. 164, Example 5:

        print >>f, ' {0:4d}  {1:5.2f} {2:7.2f}'.format(qty, price, amt)

  should be:

        print(' {0:4d}  {1:5.2f} {2:7.2f}'.format(qty, price, amt), file=f)


p. 253, Question 4:

        venn diagram

  should be:

        Venn diagram


       Softcover edition
       =================


p. 4, Figure 1-2

        One stray square in Range

p. 12, Example 2

        Let p(n) be the highest power of 2 that divides n.  That is, p(n) is the largest k
        ...
        try every value of 2^k under n

  should be:

        Let p(n) be the largest k
        ...
        try every value of 2^k less than or equal to n

p. 32, middle

       return n*(n+1)/2

  should be:

       return n*(n+1)//2

p. 44 last paragraph:

        cordinates

  should be:

        coordinates

p. 46 Example 1:

        return math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1)

  should be:

        return math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1))

p. 53 Example 4:

        >>> msg = 'You can't change me!'
        >>> msg
        'You can't change me!'
        >>> niceTry(msg)
        >>> msg
        'You can't change me!'

  should be:

        >>> msg = "You can't change me!"
        >>> msg
        "You can't change me!"
        >>> niceTry(msg)
        >>> msg
        "You can't change me!"

p. 66, Figure 4.2:

        The numbers and displacements should be 1, 1/2, 1/3, ...
        where the length of a brick is 2.  See
        http://www.skylit.com/python/Figure4-2Correction.gif.

p. 157, middle:

        "but tuples have no methods at all"

        That was true in Python 2.  In Python 3 a tuple has methods count and index.

p. 163, paragraph before Example 4:

        use print >>f, s

  should be:

        use print(s, file=f)

p. 164, Example 5:

        print >>f, ' {0:4d}  {1:5.2f} {2:7.2f}'.format(qty, price, amt)

  should be:

        print(' {0:4d}  {1:5.2f} {2:7.2f}'.format(qty, price, amt), file=f)

p. 253, Question 4:

        venn diagram

  should be:

        Venn diagram