https://blog.youkuaiyun.com/eufxtb_890zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/eufxtb_890/article/details/162320138https://blog.youkuaiyun.com/eufxtb_890/article/details/162320138eufxtb_890Fri, 26 Jun 2026 01:40:02 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162318103https://blog.youkuaiyun.com/eufxtb_890/article/details/162318103eufxtb_890Fri, 26 Jun 2026 00:51:49 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162285490https://blog.youkuaiyun.com/eufxtb_890/article/details/162285490eufxtb_890Thu, 25 Jun 2026 01:21:05 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162283331https://blog.youkuaiyun.com/eufxtb_890/article/details/162283331eufxtb_890Thu, 25 Jun 2026 00:14:34 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162257444https://blog.youkuaiyun.com/eufxtb_890/article/details/162257444eufxtb_890Wed, 24 Jun 2026 07:21:09 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162249027https://blog.youkuaiyun.com/eufxtb_890/article/details/162249027eufxtb_890Wed, 24 Jun 2026 00:10:43 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162247821https://blog.youkuaiyun.com/eufxtb_890/article/details/162247821eufxtb_890Tue, 23 Jun 2026 23:39:52 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162244273https://blog.youkuaiyun.com/eufxtb_890/article/details/162244273eufxtb_890Tue, 23 Jun 2026 20:11:34 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162195851https://blog.youkuaiyun.com/eufxtb_890/article/details/162195851eufxtb_890Mon, 22 Jun 2026 11:28:04 +080010]`筛选数据后，若直接修改新DataFrame的值，可能因视图（view）与副本（copy）问题导致原始数据被意外更改。大数据集下，Pandas可能占用过高内存。例如，默认的`int64`和`float64`对于小范围数值可降级为`int8`或`float32`以节省空间。逐行迭代（如`iterrows()`）效率极低，应改用向量化操作或`apply()`。例如，`df.mean()`默认跳过NaN，但若用`np.sum()`直接计算，NaN会导致结果变为NaN。]]>https://blog.youkuaiyun.com/eufxtb_890/article/details/162184073https://blog.youkuaiyun.com/eufxtb_890/article/details/162184073eufxtb_890Mon, 22 Jun 2026 03:23:46 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162170810https://blog.youkuaiyun.com/eufxtb_890/article/details/162170810eufxtb_890Sun, 21 Jun 2026 13:40:44 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162158856https://blog.youkuaiyun.com/eufxtb_890/article/details/162158856eufxtb_890Sun, 21 Jun 2026 03:54:57 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162142410https://blog.youkuaiyun.com/eufxtb_890/article/details/162142410eufxtb_890Sat, 20 Jun 2026 11:26:06 +0800https://blog.youkuaiyun.com/eufxtb_890/article/details/162134881https://blog.youkuaiyun.com/eufxtb_890/article/details/162134881eufxtb_890Sat, 20 Jun 2026 02:38:35 +0800