>>> from matplotlib.pylab import hist, show
>>> plata = []
>>> a = plata.extend
>>> a([50])
>>> a([20]*10)
>>> a([10]*13)
>>> a([5]*8)
>>> a([2]*35)
>>> a([1]*1)
>>> plata
[50, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10,5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
>>> hist(plata, 100, (0,100))
(array([ 0,  1, 35,  0,  0, 15,  0,  0,  0,  0, 25,  0,  0,  0,  0,  0,  0,
        0,  0,  0, 13,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,
        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0]), array([   0.,
          9.,   10.,   11.,   12.,   13.,   14.,   15.,   16.,   17.,
         18.,   19.,   20.,   21.,   22.,   23.,   24.,   25.,   26.,
         27.,   28.,   29.,   30.,   31.,   32.,   33.,   34.,   35.,
         36.,   37.,   38.,   39.,   40.,   41.,   42.,   43.,   44.,
         45.,   46.,   47.,   48.,   49.,   50.,   51.,   52.,   53.,
         54.,   55.,   56.,   57.,   58.,   59.,   60.,   61.,   62.,
         63.,   64.,   65.,   66.,   67.,   68.,   69.,   70.,   71.,
         72.,   73.,   74.,   75.,   76.,   77.,   78.,   79.,   80.,
         81.,   82.,   83.,   84.,   85.,   86.,   87.,   88.,   89.,
         90.,   91.,   92.,   93.,   94.,   95.,   96.,   97.,   98.,
         99.,  100.]), <a list of 100 Patch objects>)
>>> show()