How import the libraries in spark for pca

from numpy import array
from math import sqrt
from pyspark.mllib.linalg.distributed import RowMatrix
from pyspark.ml.feature import StringIndexer, VectorAssembler
from pyspark.sql import SparkSession
from pyspark.mllib.linalg import Vectors
spark = SparkSession.builder.appName("PCA").getOrCreate()