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Python实现全链条构建跨国供应链抵抗力!

  • 2026-07-02 16:36:07
Python实现全链条构建跨国供应链抵抗力!

一段客户关系到底在哪一个月开始断掉,往往是后续所有研究最容易被忽略、却又最关键的一步。没有这一层断裂识别,后面的存续力和恢复力分析都没有真正可靠的起点。本案例要做的,就是把这种“断裂时点”从原始关系数据里完整拆出来,并最终落成一张可直接使用的抵抗力结果面板。

案例背景

本案例围绕跨国供应链关系的断裂识别构建结果面板。研究对象是中国供应商与海外客户之间的关系链条,核心问题是:在逐月关系的时间维度上,一段跨国供应链关系究竟是在哪一个月发生断裂。项目最终形成的是抵抗力结果面板,记录的是关系在每一个月的断裂状态,而不是静态的关系存量。

案例价值

第一,方法可迁移。这条链路不仅适用于当前抵抗力结果面板,也适用于其他跨国供应链结果数据的构建任务。第二,全流程工程化。项目从原始关系数据出发,经过样本筛选、月度展开、断裂识别、结果抽取,再到公司匹配,形成完整结果交付闭环。第三,教学与复用友好。每一步都有明确输入输出,中间结果文件保存完整,很适合课堂演示、论文复刻和后续再开发。

案例代码获取

可直接在此下载:ppmandata.net/codeBase/list,或者扫码成为超级课程会员免费获取。

指标定义与构建方法

本案例最终保留一个核心结果字段:Break。它的含义是:当前月关系存在、下一月关系断开时,该月记为 1;如果下一月关系仍然持续,则记为 0从当前结果看,抵抗力结果面板共有 444,852 条月度观察记录,其中 Break=1 的记录共有 20,175 条,Break=0 的记录共有 424,677 条,Break 均值为 0.0454。这说明在完整关系链路中,真正的断裂月份占比不高,但一旦识别出来,就能成为后续存续力与恢复力分析的关键起点。

Python 实现案例

第一步

任务目标是从 FactSet 原始关系数据中筛出“中国供应商 - 海外客户”样本。关键函数是 step1_sample_filter.py 中围绕 CUSTOMER 和 SUPPLIER 两个方向构造的筛选逻辑。技术难点在于原始关系方向并不统一,必须先把关系折算成一致口径,否则后面的月度面板和断裂识别都会偏掉。

mask_b = (    (chunk["rel_type"] == "CUSTOMER") &    (chunk["source_isin"].str[:2] == config.SOURCE_COUNTRY) &    (chunk["target_isin"].str[:2] != config.SOURCE_COUNTRY))

第二步

任务目标是把区间型关系展开成逐月面板。关键函数是 expand_row_to_months。技术难点在于结束月份边界处理,脚本里通过 end_dt - 1 day 做区间校正,避免把终止月多算进去。

defexpand_row_to_months(row):    start_p = row["start_dt"].to_period("M")    end_p_adj = (row["end_dt"] - pd.Timedelta(days=1)).to_period("M")    months = pd.period_range(start=start_p, end=end_p_adj, freq="M")return months.tolist()

第三步

任务目标是识别断裂月份。关键函数是 step3_break_sustainability.py 中基于 shift(-1) 的逐月断裂检测逻辑。技术难点在于必须先把关系转换成逐月链条,才能准确识别“当前月有、下一月无”的断裂时点。

panel["next_month"] = panel.groupby(group_cols)["month"].shift(-1)panel["Break"] = np.where(cond_gap | cond_last, 10)

第四步

任务目标是抽取抵抗力结果面板并并回公司匹配信息。关键函数是 step4_recovery_indicators.py 中输出 Break 子表的逻辑,以及 step5_match_resset.py 中把匹配字段并回结果面板的逻辑。技术难点在于这一步已经不是单纯算值,而是要把断裂结果整理成一张可直接交付的最终 CSV。

df_break = panel[id_cols + ["Break"]].copy()df_break.to_csv(config.BREAK_CSV, index=False, encoding="utf-8-sig")

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  1. CONNECT:[ UseTime:0.000601s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000803s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000302s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000256s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000461s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000546s ]
  8. SELECT * FROM `article` WHERE `id` = 495127 LIMIT 1 [ RunTime:0.000425s ]
  9. UPDATE `article` SET `lasttime` = 1783032092 WHERE `id` = 495127 [ RunTime:0.008674s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000333s ]
  11. SELECT * FROM `article` WHERE `id` < 495127 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000484s ]
  12. SELECT * FROM `article` WHERE `id` > 495127 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000385s ]
  13. SELECT * FROM `article` WHERE `id` < 495127 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001480s ]
  14. SELECT * FROM `article` WHERE `id` < 495127 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009268s ]
  15. SELECT * FROM `article` WHERE `id` < 495127 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009745s ]
0.102408s