black_white_ratio_dict = {'ambuja_plus': 1.2, 'acc_gold': 1.2, 'acc_suraksha_power_plus': 1.2, 'ambuja_buildcem': 1.2, 'acc_suraksha_power': 1.2, 'acc_nfr': 1.2, 'acc_concrete_plus': 1.2}


lack_white_ratio = black_white_ratio_dict["{class_name}".format(class_name="ambuja_plus")]
print(lack_white_ratio)