Evaluate X and Y returned from the differential equation solvers using printput frequency in Python，solversprintput,''' printSol

Evaluate X and Y returned from the differential equation solvers using printput frequency in Python，solversprintput,''' printSol

''' printSoln(X,Y,freq).    Prints X and Y returned from the differential    equation solvers using printput frequency 'freq'.        freq = n prints every nth step.        freq = 0 prints initial and final values only.'''def printSoln(X,Y,freq):    def printHead(n):        print "\n        x  ",        for i in range (n):            print "      y[",i,"] ",        print    def printLine(x,y,n):        print "%13.4e"% x,        for i in range (n):            print "%13.4e"% y[i],        print    m = len(Y)    try: n = len(Y[0])    except TypeError: n = 1    if freq == 0: freq = m    printHead(n)    for i in range(0,m,freq):        printLine(X[i],Y[i],n)    if i != m - 1: printLine(X[m - 1],Y[m - 1],n)