撰写电子书致辞

把这本书，献给所有愿意把生活调成“省电模式”的你们：把车钥匙换成步数的人，把一次性换成耐用的人，把“算了吧”换成“我试试”的人。也献给偶尔犯懒又愿意重来的我们，跌倒一脚泥，仍然拍拍裤子继续走。

谢谢那些一路陪伴的“小配角”：被反复装满的保温杯、被拎得变形的帆布袋、被及时关掉的开关。它们像日常里的小小掌声，提醒我们：每一个看似微不足道的选择，都在悄悄改变结局。也谢谢地球——这间蓝色的出租屋，押金能不能退多点，就看我们怎么住。

愿你读完后，在按下“购买”前多犹豫三秒，在出门前多带一个袋子，在想不开车时多给自己一次步行的机会。愿我们把低碳，过成轻松不费劲的日常；把未来，活成值得回头的风景。

Dedication

To the curious minds who look at a messy spreadsheet and think, “Yeah, I can make sense of this.”

To the night owls, early birds, and everyone who swears they’re just going to “clean one more column” and somehow ends up three hours deep in a Jupyter notebook.

To the open-source heroes behind Python, NumPy, pandas, Jupyter, and Matplotlib—your work turns chaos into clarity and confusion into charts. You make this journey possible (and honestly, way more fun).

To every stubborn bug that taught me patience, every green checkmark that felt like fireworks, and every tiny insight that made the whole dataset worth it.

And to you—reading this right now—whether you’re pivoting careers, leveling up at work, or just data-curious: this little book is for you. May it help you ask better questions, find cleaner answers, and enjoy the process along the way.