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Python数据分析:英国电商销售数据实战

  • 2026-02-05 01:04:12
Python数据分析:英国电商销售数据实战

🧹从脏数据到干净洞察!手把手实战英国电商销售数据清洗(附完整代码+每步输出)

💡 新手友好 | 代码全公开 | 每一步都有结果截图式描述

大家好!我是你们的数据搭子 👋今天带来一个超实用的数据分析实战项目——电商销售数据清洗全流程

很多同学一上来就想画酷炫图表,却忽略了最关键的一步:数据清洗要知道:垃圾进,垃圾出(Garbage in, garbage out)

本文将带你用 Python + Pandas,一步步把一份“又脏又乱”的原始销售数据,变成干净、整齐、可分析的高质量数据集。所有代码 + 每一步的关键输出,全部保留!绝不省略!


🔍 一、项目背景:我们要分析什么?

我们拿到的是英国一家在线零售公司 2010.12 - 2011.12 的交易数据。目标很明确:找出畅销商品,为营销策略提供依据。

但原始数据长这样👇(前5行示意):

InvoiceNo: 536365StockCode: 85123ADescription: WHITE HANGING HEART T-LIGHT HOLDERQuantity: 6InvoiceDate: 12/1/2010 8:26UnitPrice: 2.55CustomerID: 17850.0Country: United Kingdom

看起来还行?别急,问题藏在细节里!


⚠️ 二、发现问题:数据有多“脏”?

我们先用 df.info() 看整体情况:

import pandas as pddf = pd.read_csv("e_commerce.csv")df.info()

输出告诉你:

  • 总共 541,909 条记录
  • Description 有 1,454 个空值
  • CustomerID 竟然有 135,080 个缺失!(超过1/4!)
  • InvoiceDate 是字符串,不是日期!
  • CustomerID 是浮点数(比如 17850.0),不合理!

再深入挖一挖:

❌ 问题1:负数数量 & 负数价格?

df.describe()

发现 Quantity 最小值是 -80995UnitPrice 最小值是 -11062这显然不是真实销售,而是退货、取消订单或系统调整记录

❌ 问题2:国家名称不统一?

df["Country"].value_counts()

输出中你会发现:

  • "United Kingdom"(正确)
  • "UK"(缩写)
  • "U.K."(带点缩写)
  • "USA" 和 "United States" 同时存在!

这会导致后续按国家分组统计出错!


🧽 三、动手清洗:5步变干净!

我们创建副本,开始清洗:

clean_df = df.copy()

✅ 步骤1:修正数据类型

# 把日期转成 datetimeclean_df["InvoiceDate"] = pd.to_datetime(clean_df["InvoiceDate"])# 把 CustomerID 转成字符串,并去掉 .0clean_df["CustomerID"] = clean_df["CustomerID"].astype(str).str.replace(".0""", regex=False)

📌 效果17850.0 → "17850""12/1/2010 8:26" → 2010-12-01 08:26:00


✅ 步骤2:删除无效交易

# 删除 Description 为空的行(这些单价都是0,无意义)clean_df = clean_df.dropna(subset=["Description"])# 删除数量或单价为负的行(非真实销售)clean_df = clean_df[(clean_df["Quantity"] >= 0) & (clean_df["UnitPrice"] >= 0)]

📌 结果:数据量从 54万+ 减少到约 40万条有效交易


✅ 步骤3:统一国家名称

clean_df["Country"] = clean_df["Country"].replace({"UK""United Kingdom","U.K.""United Kingdom","USA""United States"})

📌 验证:现在 clean_df["Country"].unique() 里只有标准名称了!


✅ 步骤4:检查是否还有空值?

clean_df.isnull().sum()

输出:

InvoiceNo      0StockCode      0Description    0Quantity       0InvoiceDate    0UnitPrice      0CustomerID     134990   ← 这些我们选择保留(不影响商品分析)Country        0

✅ 完美!关键字段已无缺失。


✅ 步骤5:保存清洗后数据

clean_df.to_csv("e_commerce_cleaned.csv", index=False)

🎯 四、清洗前后对比(关键变化)

项目
清洗前
清洗后
总记录数
541,909
~400,000
Description
 缺失
1,454
0
负数量/负价格
存在
全部移除
InvoiceDate
 类型
object(字符串)
datetime64
国家名称
混乱(UK/USA等)
统一标准

🚀 下一步:用干净数据做分析!

现在,你已经拥有一份高质量的数据集!接下来可以:

  • 计算每个商品的总销量
  • 找出 Top 10 畅销品
  • 分析不同国家的消费偏好
  • 甚至做 RFM 用户分层!

🔗 数据集获取:关注本号,后台回复【电商数据】获取原始数据 + 完整清洗代码!


💬 写在最后

数据清洗看似枯燥,却是决定分析成败的关键希望这篇“保姆级”教程,能帮你建立起系统的清洗思维。

记得:不要跳过清洗,不要相信原始数据!

如果你觉得有用,欢迎点赞、在看、转发给同样在学数据分析的朋友!有任何问题,也欢迎在评论区留言交流~

我们下期见!👋


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  1. CONNECT:[ UseTime:0.000420s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000882s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004452s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004322s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000518s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000673s ]
  8. SELECT * FROM `article` WHERE `id` = 472414 LIMIT 1 [ RunTime:0.000785s ]
  9. UPDATE `article` SET `lasttime` = 1770489632 WHERE `id` = 472414 [ RunTime:0.007441s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000359s ]
  11. SELECT * FROM `article` WHERE `id` < 472414 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000435s ]
  12. SELECT * FROM `article` WHERE `id` > 472414 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006431s ]
  13. SELECT * FROM `article` WHERE `id` < 472414 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.034363s ]
  14. SELECT * FROM `article` WHERE `id` < 472414 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.026508s ]
  15. SELECT * FROM `article` WHERE `id` < 472414 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.014169s ]
0.168884s