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"""
一个依赖第三方库的示例脚本:使用 pandas 和 numpy。
运行后应打印 pandas/numpy 版本、简单数据处理结果。
"""
import sys
import platform
from datetime import datetime
import numpy as np
import pandas as pd
def main():
print("[hello_thirdparty] 启动时间:", datetime.now().isoformat())
print("[hello_thirdparty] Python:", sys.version.replace("\n", " "))
print("[hello_thirdparty] 平台:", platform.platform())
print("[hello_thirdparty] numpy:", np.__version__)
print("[hello_thirdparty] pandas:", pd.__version__)
# 构造一个简单的 DataFrame 并做一次计算
df = pd.DataFrame({"a": np.arange(5), "b": np.arange(5) ** 2})
df["c"] = df["a"] + df["b"]
print("[hello_thirdparty] DataFrame head:\n", df.head().to_string(index=False))
print("[hello_thirdparty] 脚本运行完成,准备退出。")
abc
if __name__ == "__main__":
main()