Code showing no reults

[ayaz786amd]

Fraud = df[df['Class'] == 1]
Valid = df[df['Class'] == 0]

outlier_fraction = len(Fraud)/ float(len(Valid))

print(outlier_fraction)
print('Fraud Cases ()'.format(len(Fraud)))
print('Valid Cases()'.format(len(Valid)))

Output i m getting:

0.0017234102419808666
Fraud Cases ()
Valid Cases()

not getting results for fraud cases and valid cases.