python代码中的错误。需要建议缺少什么[关闭]

Question

import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn import preprocessing 

data_train = pd.read_csv("Train_data.csv")
data_test = pd.read_csv("Test_data.csv")

from sklearn.preprocessing import StandardScaler
scaler = StandardScaler()

standardized_train_data = scaler.fit_transform(data_train.select_dtypes(include=['float64','int64']))
standardized_test_data = scaler.fit_transform(data_test.select_dtypes(include=['float64','int64']))

到目前为止，代码正在运行。运行以下命令后，出现错误。

standardized_traindf = pd.DataFrame(sc_train, columns = cols)
standardized_testdf = pd.DataFrame(sc_test, columns = cols)

Error : name 'sc_train' is not defined

我们必须在哪里定义这些？

Answer 1

错误信息说明了一切。 sc_train 和 sc_test 未定义。这些应该分别是standardized_train_data 和standardized_test_data。