Inconsistent use of tabs and spaces in indentation

motion.py

import pygame
import sys
from settings import Settings
from raindrop import Raindrop

def update_location_of_raindrops(set1, raindrops):
    screen_rect = screen.get_rect()

    for raindrop in raindrops.sprites():
        raindrop.y += set1.raindrop_vertical_speed
        raindrop.rect.y = raindrop.y

        if(raindrop.rect.top > screen_rect.bottom):					
		building_fleet.create_new_row_above(set1, screen, raindrop)