Exception handling values

# Outlier processing
Import PANDAS AS PD
Import numpy AS NP
SegData = pd.read_csv ( './ Data / data1.csv', encoding = 'GBK')
SegData.head ()
SegData.describe (). T
SegData.loc [:, 'purchase price suppliers'] [SegData supplier purchase price> 30,000.]

SegData.loc [3, 'purchase price suppliers'] = np.nan
SegData.describe (). T

data=pd.read_excel('./data/data4.xlsx',header=None)
print(data)
#标准分数
(data-data.mean())/data.std()