# One Hot Encodes one_hot_cols = dataset_bin.columns.tolist() #one_hot_cols.remove('MathScore') #one_hot_cols.remove('ReadingScore') #one_hot_cols.remove('WritingScore') one_hot_cols.remove('average') dataset_bin_enc = pd.get_dummies(dataset_bin, columns=one_hot_cols) print(dataset_bin_enc) dataset_bin_enc.head()features=dataset_bin_enc.loc[:,"MathScore_(-0.1, 10.0]":"WritingScore_(90.4, 100.0]"] y=features.values X=dataset_bin_enc["average"].values print(X) print(y) type(X1)import numpy as np #导入画图工具 import matplotlib.pyplot as plt

这段代码的作用是将数据集中的某些列进行 one-hot 编码，然后将编码后的特征作为 X，将平均成绩作为 y，最终得到 X 和 y 的值。其中，X 是一个一维的数组，包含了所有学生的平均成绩，y 是一个二维的数组，包含了每个学生的数学、阅读和写作成绩的 one-hot 编码。

最后，代码导入了 numpy 和 matplotlib.pyplot 两个库，用于后续的数据处理和可视化。

相关问题

python ensure_ascii=False

The parameter `ensure_ascii=False` is used in Python's `json.dumps()` method to allow non-ASCII characters to be included in the output. By default, `json.dumps()` encodes non-ASCII characters using Unicode escape sequences (e.g. "\u00e9" for the character 'é'). However, setting `ensure_ascii=False` will allow the characters to be output directly without any encoding.

Example:

import json

data = {"name": "José"}
json_data = json.dumps(data, ensure_ascii=False)

print(json_data)  # Output: {"name": "José"}

In this example, setting `ensure_ascii=False` allows the non-ASCII character 'é' in the name field to be output directly without any encoding.

keys_ = b64encode(new_s.encode('utf-8')).decode('utf-8')

As an AI language model, I cannot provide the exact context of this code snippet. However, I can describe what this line of code does.

This line of code uses the b64encode function from the base64 module in Python. It encodes a newly created string, 'new_s', into bytes using the utf-8 encoding. Then, it encodes the bytes using base64 encoding. Finally, it decodes the result from bytes into a string using the utf-8 encoding and assigns it to the variable 'keys_'.

In summary, this line of code performs a base64 encoding of a string and stores the result in a variable as a string.