Python プログラミングの実践的な応用を探る

import numpy as np
import matplotlib.pyplot as plt

# 生成随机数据
x = np.linspace(0, 10, 100)
y = np.sin(x) + np.random.normal(0, 0.1, 100)

# 绘制数据点
plt.scatter(x, y, label='Data')

# 拟合数据并绘制拟合曲线
coefficients = np.polyfit(x, y, 3)
p = np.poly1d(coefficients)
plt.plot(x, p(x), 'r', label='Fitted curve')

plt.xlabel('X')
plt.ylabel('Y')
plt.legend()
plt.show()

import pandas as pd
from sklearn.model_selection import train_test_split
from sklearn.ensemble import RandomForestClassifier
from sklearn.metrics import accuracy_score

# 读取数据
data = pd.read_csv('data.csv')

# 处理数据
X = data.drop('label', axis=1)
y = data['label']

# 划分训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

# 训练随机森林分类器
clf = RandomForestClassifier()
clf.fit(X_train, y_train)

# 预测并计算准确率
y_pred = clf.predict(X_test)
accuracy = accuracy_score(y_test, y_pred)
print('Accuracy:', accuracy)

import socket

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('localhost', 8888))
server.listen(5)

while True:
    conn, addr = server.accept()
    data = conn.recv(1024)
    print('Received:', data)
    conn.sendall(b'Hello from server')
    conn.close()

import socket

client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect(('localhost', 8888))
client.send(b'Hello from client')
response = client.recv(1024)
print('Response from server:', response)
client.close()