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def digit(num, n):
    """Returns nth digit of num (both integers)"""
    return abs(num)//10**n%10

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$ go get -u github.com/username/repo

# Profile test
$ go test -coverprofile cover.out github.com/username/repo

# Generate nicer html representation from profiles
$ go tool cover -html=cover.out -o cover.html

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# For more details: http://matthiaseisen.com/pp/patterns/p0203/

for index, abin in enumerate(packer):
  bw, bh  = abin.width, abin.height
  print('bin', bw, bh, "nr of rectangles in bin", len(abin))
  fig = plt.figure()
  ax = fig.add_subplot(111, aspect='equal')
  for rect in abin:
    x, y, w, h = rect.x, rect.y, rect.width, rect.height
    plt.axis([0,bw,0,bh])

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from operator import attrgetter

def sort_by_attr(alist, *args):
    """
    Sort an object list by one or more of its atributes

    Parameters:
        alist (list): object list
        *args (strings): the name of one or more of the objects attributes
            possibly preceded by a '-' sign to use reversed order