# 安装 Python
# Windows: https://www.python.org/downloads/
# Mac: brew install python3
# Linux: sudo apt install python3

# 创建虚拟环境
python -m venv venv
source venv/bin/activate  # Linux/Mac
venv\Scripts\activate   # Windows

# 安装依赖
pip install pandas numpy matplotlib

# 变量
name = "suisui"
age = 25
is_student = True

# 列表
fruits = ["apple", "banana", "orange"]

# 循环
for fruit in fruits:
    print(fruit)

# 函数
def greet(name):
    return f"Hello, {name}!"

# 列表推导式
squares = [x**2 for x in range(10)]

# 字符串
text = "Hello Python"
print(text.upper())  # HELLO PYTHON

# 列表
numbers = [1, 2, 3, 4, 5]
print(numbers[1:3])  # [2, 3]

# 字典
person = {"name": "suisui", "age": 25}
print(person["name"])  # suisui

import os

def batch_rename(folder, prefix="file_"):
    for i, filename in enumerate(os.listdir(folder), 1):
        ext = os.path.splitext(filename)[1]
        new_name = f"{prefix}{i:03d}{ext}"
        os.rename(os.path.join(folder, filename), 
                   os.path.join(folder, new_name))
        print(f"重命名: {filename} -> {new_name}")

# 使用
batch_rename("/path/to/files", prefix="photo_")

Python 基础
    ↓
函数 → 模块 → 面向对象
    ↓
    ↓
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