Updates and Errata - Fourth printing
This page is broken into two parts, Updates and Errata. Updates address issues that affect whether your code will run or not. Errata refer to minor issues such as typos, and errors in grayed-out code that probably won’t affect the code you’re entering.
Code that produces warnings but still runs correctly is noted under Errata, as this is a fairly common occurrence and the code often still works for a long time while producing warnings.
If you find an error in the book that's not listed here, or can’t get something to work, please let me know.
Updates
Chapter 20
The second half of Chapter 20, starting on page 445, focuses on the process of deploying Learning Log to the hosting company Platform.sh. That company has rebranded as Upsun, and they've changed their approach to deployment somewhat.
Fully up-to-date instructions for deploying Learning Log are posted on the Deploying Django page. If anything in these instructions is not working for you, please don't hesitate to reach out.
Errata
Chapter 16
On page 351, the line that starts the for loop over all_eq_dicts is missing. This line was shown in earlier listings, but was left out on this page.
The listing on page 351 should look like this:
--snip--
mags, lons, lats, eq_titles = [], [], [], []
for eq_dict in all_eq_dicts:
mag = eq_dict['properties']['mag']
lon = eq_dict['geometry']['coordinates'][0]
lat = eq_dict['geometry']['coordinates'][1]
eq_title = eq_dict['properties']['title']
mags.append(mag)
lons.append(lon)
lats.append(lat)
eq_titles.append(eq_title)
title = 'Global Earthquakes'
fig = px.scatter_geo(lat=lats, lon=lons, size=mags, title=title,
--snip--
projection='natural earth',
hover_name=eq_titles,
)
fig.show()
Chapter 19
On page 417 under The login Template the path to the accounts/ directory should be learning_log/accounts/, not ll_project/accounts/. The full path to the login.html template should be: learning_log/accounts/templates/registration/login.html.