Rotate ship

import math

#rotation function
def rotate(coordinates,angle):
#convert the coordinates from dictionary to integers
    x = coordinates['x']
    y = coordinates['y']
    #apply the rotation matrix
    Xn = x * math.cos(angle) - y * math.cos(angle)
    Yn = x * math.sin(angle) + y * math.cos(angle)
    #return the new coordinates in dictionary format
    return {'x': Xn , 'y': Yn}
AircraftCarrier = [{'x':0,'y':0},{'x':0,'y':-1},{'x':0,'y':-2},{'x':0,'y':-3},{'x':-1,'y':-3},{'x':1,'y':-3}]
for panel in AircraftCarrier:
    print rotate(panel,(math.pi*3/2))