python有趣代码

生成彩色文本：

python
class colors:
    RESET = '3[0m'
    BOLD = '3[1m'
    UNDERLINE = '3[4m'
    RED = '3[91m'
    GREEN = '3[92m'
    YELLOW = '3[93m'
    BLUE = '3[94m'
    PURPLE = '3[95m'
    CYAN = '3[96m'

print(colors.RED + "Hello, this is in red!" + colors.RESET)

绘制彩色螺旋：

python
import turtle
from colorsys import hsv_to_rgb

turtle.speed(0)
turtle.bgcolor('black')

for i in range(360 * 10):
    turtle.color(*hsv_to_rgb(i / 360, 1.0, 1.0))
    turtle.forward(i)
    turtle.left(59)

turtle.done()

使用Pygame创建简单的游戏：

python
import pygame
import sys

pygame.init()

width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("My Game")

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    screen.fill((255, 255, 255))  # White background
    pygame.draw.circle(screen, (255, 0, 0), (400, 300), 30)  # Red circle
    
    pygame.display.flip()

使用Matplotlib绘制三维图形：

python
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
z = np.linspace(-2, 2, 100)
r = z**2 + 1
x = r * np.sin(theta)
y = r * np.cos(theta)

ax.plot(x, y, z, label='3D spiral')
ax.legend()

plt.show()

文本艺术生成器：

python
from art import *

text = "Hello, ASCII Art!"
result = text2art(text)
print(result)

在运行这个代码之前，你需要安装 art 库。可以使用

bash
pip install art

这个库可以将普通文本转换成ASCII艺术风格。

爬取猫咪图片：

python
import requests
from bs4 import BeautifulSoup
from urllib.parse import urljoin

url = "https://www.reddit.com/r/aww/top/?t=week"
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"}

response = requests.get(url, headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')

for i, post in enumerate(soup.find_all('div', class_='s1okktje-0')):
    image_url = post.find('img')['src']
    image_url = urljoin(url, image_url)
    response = requests.get(image_url)
    with open(f'cat_{i+1}.jpg', 'wb') as f:
        f.write(response.content)

这个代码使用 requests 和 BeautifulSoup 库从Reddit上抓取一周内最受欢迎的猫咪图片。

使用Python进行情感分析：

python
from textblob import TextBlob

text = "I love coding with Python!"
analysis = TextBlob(text)

print(f"Text: {text}")
print(f"Sentiment: {'Positive' if analysis.sentiment.polarity > 0 else 'Negative' if analysis.sentiment.polarity < 0 else 'Neutral'}")

这段代码使用 textblob 库对文本进行情感分析，判断文本的情感是积极、消极还是中性。

使用Flask创建一个简单的Web应用：

python
from flask import Flask

app = Flask(__name__)

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

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

这是一个使用 Flask 创建的极简单Web应用。运行代码后，访问 http://127.0.0.1:5000/ 就可以看到 "Hello, World!"。