Matthes E. Python Crash Course.a Hands-on-..pro... ✓

“Good. Now refactor it.”

She looked at the book. Its pages had stopped glowing. Matthes E. Python Crash Course.A Hands-On-..Pro...

Then she opened Chapter 2: “Variables and Simple Data Types.” “Good

She typed. Red error.

By 3 a.m., she had loaded the data. By 4 a.m., she had filtered out the null values that had been crashing Excel. By 5 a.m., Eric had her writing a function to calculate retention cohorts—something her boss paid a consultant $20,000 to do last year. 000 to do last year.