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Python数据清洗的9个高频用法

  • 2026-08-18 23:10:31
Python数据清洗的9个高频用法

Python数据清洗的9个高频用法

Python数据清洗的9个高频用法，处理缺失/异常/重复数据必备 利用Python进行数据处理时，清洗环节至关重要——面对缺失值、异常值与重复数据，高效清洗能极大提升数据质量。 pandas库为我们提供了丰富的功能来处理这些问题，下面是我在实际工作中最常用的9个数据清洗方法：
处理缺失值：删除或填充缺失数据
去除重复值：基于条件或全部列去重
格式化数据：统一日期、字符串等格式
处理异常值：识别并处理超出合理范围的数据
数据类型转换：规范字段类型，提升处理效率
字符串处理：拆分、替换、拼接等文本操作
调整列顺序：按需重新排列数据列
正则提取信息：从文本中提取特定模式内容
数据合并：多数据源的拼接与整合
#算法 #数据库 #计算机 #Python #Python编程 #编程 #数据分析我在行 #数据分析

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  1. CONNECT:[ UseTime:0.001043s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001587s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000698s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000703s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001369s ]
  6. SELECT * FROM `set` [ RunTime:0.015499s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001546s ]
  8. SELECT * FROM `article` WHERE `id` = 504605 LIMIT 1 [ RunTime:0.045298s ]
  9. UPDATE `article` SET `lasttime` = 1787319486 WHERE `id` = 504605 [ RunTime:0.009521s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.007886s ]
  11. SELECT * FROM `article` WHERE `id` < 504605 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001790s ]
  12. SELECT * FROM `article` WHERE `id` > 504605 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001089s ]
  13. SELECT * FROM `article` WHERE `id` < 504605 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002352s ]
  14. SELECT * FROM `article` WHERE `id` < 504605 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.019948s ]
  15. SELECT * FROM `article` WHERE `id` < 504605 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002143s ]
0.276415s