python - 机器学习: UserWarning: Pandas doesn't allow columns to be created via a new attribute name

Question

i am new in the machine learning. when i run the code basically icoped the code from the teacher's note. but i got some "userwarning"

using single csv file for performing decision tree

data = pd.read_csv("H:\spyder python program\data_file\iris_data.csv")

data.features = data[["SepalLength", "SepalWidth", "PetalLength", "PetalWidth"]]
data.targets = data.Class

这是警告显示的地方

输出

 UserWarning: Pandas doesn't allow columns to be created via a new attribute name 
  data.features = data[["SepalLength", "SepalWidth", "PetalLength", "PetalWidth"]]

Answer 1

Pandas“认为”您正在尝试创建名为“features”和“targets”的新列。你不能这样做，你应该使用 data['features'] = ... 语法。但目前尚不清楚您总体上想做什么。你应该做这样的事情:

X = data[["SepalLength", "SepalWidth", "PetalLength", "PetalWidth"]]
y = data['Class']
model.fit(X, y)