如何从Pandas数据帧中检索列值并检查条件

Question

Dataframe列类由2个值0和1组成。我想计算类0的行数和类1的行数

genuine_count=0
fraud_count=0
if credit_card_df['Class'] == 1:
    fraud_count +=1
else:
    genuine_count +=1
print "Genuine transactions"+genuine_count
print "Fraud transactions"+fraud_count

我得到了这个错误

^{pr2}$

请帮帮我解决。谢谢在

Answer 1

就这么做吧：

fraud_count = (credit_card_df['Class'] == 1).sum()
genuine_count = (credit_card_df['Class'] == 0).sum()

print "Genuine transactions {}.".format(genuine_count)
print "Fraud transactions {}.".format(fraud_count)

我希望这有帮助。在