What does Error: 'module' object is not callable Mean?

[Cal Who]

I cleaned up the code by moving all the imports to the top.
 There are two plotting routines shown below.
 Either one will work without error.
 But when I include both,  running produces:
 The exception unknown software exception (0x40000015) occurred in the
 application at location 0x1e05b62a.
 In a dialog box and the following in the console:
 Fatal Python error: PyEval_RestoreThread: NULL tstate
  This application has requested the Runtime to terminate it in an unusual
 way.
  Please contact the application's support team for more information.

 Do you see what is wrong?

 Thanks a lot

from pylab import plot, legend, title, grid, show, xlabel, ylabel
...snip....

#FIRST PLOT
plot( targets2, 'b--' )
plot( output, 'k-' )
legend(('target', 'output'))
xlabel('pattern'); ylabel('benign or malignant')
title('Outputs vs. target of trained network.')
grid(True)
show()

#SECOND PLOT
drawffnet(nn)
show()