How to import planetcnc module in Python

I am trying to run steppers motor which are connected to planetcnc card and able to be run via tng software but it does not work on python interface and the problem seems to be the planecnc library can not be found. How to add it?

#! /usr/bin/env python
# name=Lissajous curve
# desc=Generates Lissajous curve

import sys
import time
import math
import planetcnc
import gcode


# sys.path.append(planetcnc.getPathProfile("Python") )

def calc(angle, A, A2, A3, B, B2, B3):
xx = A * math.sin(math.radians(A2 * angle + A3))
yy = B * math.cos(math.radians(B2 * angle + B3))
return xx, yy


def Lissajous(x, y, z, A, B, A2, B2, A3, B3, scale, res):
if not gcode.lineAddAllowed():
planetcnc.msg("Adding g-code lines is not allowed!")
return 1

gcode.lineAdd("%")
gcode.lineAdd("G00 X", x, " Y", y + scale, " Z", z)
angle = 0
while angle < 360:
xx, yy = calc(angle, A, A2, A3, B, B2, B3)
gcode.lineAdd("G01 X", x + (scale * xx), " Y", y + (scale * yy))
angle += res
gcode.lineAdd("%")


if __name__ == '__main__':
Lissajous(0, 0, 0, 1, 1, 1, 3, 0, 0, 100, 1)
# Lissajous(0, 0, 0, 1, 1, 2, 5, 0, 0, 100, 1)
# Lissajous(0, 0, 0, 1, 1, 5, 3, 0, 0, 100, 1)