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

“You didn’t install pandas,” Eric sighed. “Chapter 12, side note. Fine. pip install pandas . Yes, in the terminal. No, not in the Python shell. Outside it, Lena. Outside.”

She hit “Run” one last time. The script executed in 1.2 seconds. Matthes E. Python Crash Course.A Hands-On-..Pro...

Eric didn’t teach her loops first. He threw her into the fire. “You didn’t install pandas,” Eric sighed

Her boss replied from 30,000 feet: “Wait. You know Python?” pip install pandas

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.

“Don’t be sorry. Be curious . Now, let’s visualize this. Chapter 15—plotting with Matplotlib. Make it ugly. We’ll fix it later.”