Python - Error en print despues de un for

print x,

from math import*

def potencial (x,y,a,b):

	V0=100

	V=0

	for n in range(10):

		m=2*n+1

		V= V + sin(m*pi*a/float(b))* sinh(m*pi*y/float(b))/(m*sinh(m*pi*a/float(b)))

	V= 4*V0*V/pi

	return V

def barredor (xmin, xmax, ymin, ymax, div):

	Dx =(xmin - xmin)/float	(div)

	DY =(ymin - ymin)/float	(div)

	x = xmin

	y = ymin

	for j in range(div + 1):

		xmin = 0

		for i in range(div + 1):

			print x,      " Aqui es el error"

			print y,

			print round(potencial(x,y,ymax,xmax),2)

			x= x + Dx

			y = y + Dy

print	barredor((0,1,0,1,4)

print(x)