ModuleNotFoundError: No module named 'sewar.full_ref'; 'sewar' is not a package

Question

I installed Sewar using pip install sewar after that i got same error like below

from sewar.full_ref import mse, rmse, psnr, uqi, ssim, ergas, scc, rase, sam, msssim, vifp
import cv2
org = cv2.imread("org_path")
blur = cv2.imread("blur_path")
print("MSE: ", mse(blur, org))
print("RMSE: ", rmse(blur, org))
print("PSNR: ", psnr(blur, org))
print("SSIM: ", ssim(blur, org))
print("UQI: ", uqi(blur, org))
print("MSSSIM: ", msssim(blur, org))
print("ERGAS: ", ergas(blur, org))
print("SCC: ", scc(blur, org))
print("RASE: ", rase(blur, org))
print("SAM: ", sam(blur, org))
print("VIF: ", vifp(blur, org))

when i run this code I got this error

  from sewar.full_ref import mse, rmse, psnr, uqi, ssim, ergas, scc, rase, sam, msssim, vifp
  ModuleNotFoundError: No module named 'sewar.full_ref'; 'sewar' is not a package