10个常用python第三方库

作者：夕阳下的孤影发布日期:2025-07-06 浏览:51
# 1. requests - 简单易用的HTTP库
import requests

response = requests.get('https://api.github.com')
print(response.status_code)  # 打印响应状态码
print(response.json())  # 打印响应内容（假设是JSON格式）

# 2. pandas - 数据分析和处理库
import pandas as pd

data = {'Name': ['Alice', 'Bob', 'Charlie'], 'Age': [25, 30, 35]}
df = pd.DataFrame(data)
print(df)

# 3. numpy - 科学计算库
import numpy as np

array = np.array([1, 2, 3, 4, 5])
print(array * 2)  # 数组乘以2

# 4. matplotlib - 数据可视化库
import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [1, 4, 9, 16, 25]
plt.plot(x, y)
plt.show()

# 5. scikit-learn - 机器学习库
from sklearn.datasets import load_iris
from sklearn.model_selection import train_test_split
from sklearn.neighbors import KNeighborsClassifier

iris = load_iris()
X_train, X_test, y_train, y_test = train_test_split(iris.data, iris.target, test_size=0.2)
knn = KNeighborsClassifier()
knn.fit(X_train, y_train)
print(knn.score(X_test, y_test))

# 6. beautifulsoup4 - HTML解析库
from bs4 import BeautifulSoup

html_doc = """
<html>
<head><title>The Dormouse's story</title></head>
<body>
<p class="title"><b>The Dormouse's story</b></p>
</body>
</html>
"""
soup = BeautifulSoup(html_doc, 'html.parser')
print(soup.title.string)

# 7. flask - 微型Web框架
from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run()

# 8. sqlalchemy - ORM库
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)

engine = create_engine('sqlite:///:memory:')
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()
new_user = User(name='Alice')
session.add(new_user)
session.commit()
print(session.query(User).all())

# 9. pillow - 图像处理库
from PIL import Image

img = Image.open('example.jpg')
img.show()

# 10. selenium - 浏览器自动化库
from selenium import webdriver

driver = webdriver.Chrome()
driver.get('https://www.python.org')
print(driver.title)
driver.quit()
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