BALaka-18

'''Question : Create a python class PCA in “pca.py” to implement PCA (Principle component analysis).
              The deliverable is a class that can be used as follows:
from pca import PCA
… .
… .
pca_model = PCA(n_component=2)
pca_model.fit(x)
print(pca_model.variance_ratio)
print(pca_model.transform(data))'''