import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from datetime import datetime
print("=== Python脚本验证能力 ===")
print("1. 基本数学运算:")
print(f" 2 + 3 = {2 + 3}")
print(f" 10 * 5 = {10 * 5}")
print(f" 100 / 4 = {100 / 4}")
print("\n2. 字符串操作:")
text = "Hello, World!"
print(f" 原始字符串: {text}")
print(f" 大写: {text.upper()}")
print(f" 小写: {text.lower()}")
print(f" 反转: {text[::-1]}")
print("\n3. 列表和字典操作:")
numbers = [1, 2, 3, 4, 5]
print(f" 列表: {numbers}")
print(f" 列表平方: {[x**2 for x in numbers]}")
person = {"name": "Alice", "age": 25, "city": "Beijing"}
print(f" 字典: {person}")
print(f" 姓名: {person['name']}")
print("\n4. 数据分析和统计:")
data = {
'name': ['Alice', 'Bob', 'Charlie', 'David', 'Eve'],
'age': [25, 30, 35, 40, 45],
'salary': [50000, 60000, 70000, 80000, 90000]
}
df = pd.DataFrame(data)
print(" 数据框:")
print(df)
print(f"\n 平均年龄: {df['age'].mean():.2f}")
print(f" 平均薪资: {df['salary'].mean():.2f}")
print(f" 年龄标准差: {df['age'].std():.2f}")
print("\n5. 文件操作:")
with open('test_file.txt', 'w') as f:
f.write("这是一个测试文件\n")
f.write("第二行内容\n")
f.write("第三行内容\n")
with open('test_file.txt', 'r') as f:
content = f.read()
print(" 文件内容:")
print(content)
print("\n6. 当前时间:")
current_time = datetime.now()
print(f" 当前时间: {current_time.strftime('%Y-%m-%d %H:%M:%S')}")
print("\n=== 脚本执行完成 ===")
