Win7SP1/ActivePython-2.7.1.3-win32-x86
matplotlib-1.0.1.win32-py2.7 from sourceforge

I met the following with my dataset:
Save emf Error: too many values to uppack
Save pdf Error: Path lacks initial MOVETO
Save eps: No Erro ,but cann't open it.

Here is the code :

import cPickle
import matplotlib.pyplot as plt 
from matplotlib import pylab
if __name__ == "__main__":
    x_list =[19373.599999999999, 11022.120000000003, 90037.820000000007, \
             57023.05000000001, 54658.360000000001, 50667.520000000004,\
             37177.82, 165244.79000000001, 2575.2399999999998, 2826.2399999999998]
    y_list = [0.0, 1172.96, 83027.377499999988, 80505.191250000003, \
     67571.089999999997, 16066.450000000001, 2806.2912500000002,\
     108459.68750000004, 0.0, 5.0800000000000001]
    myaxis = plt.gca()      
    myaxis.loglog([],[],linestyle='None') 
    myaxis.scatter(x_list,y_list,marker='x')
    plt.xlim( 10,pow(10,7) )
    plt.ylim( 10,pow(10,8) )
    plt.show()