Update covid.py

Author: pedropregueiro

consuming-apis-python/covid.py

@@ -1,16 +1,27 @@
-from datetime import date, timedelta
 import requests
 
+# The datetime package is useful to manipulate dates.
+from datetime import date, timedelta
+
+# To fetch the latest total confirmed cases number you need to pass a 24h window to the API.
+# That's why you need to pass both yesterday's date and today's.
 today = date.today()
 yesterday = today - timedelta(days=1)
+
+# Pick a country slug from the list: https://api.covid19api.com/countries
 country = "germany"
-endpoint = "https://api.covid19api.com/country/%s/status/confirmed" % country
+
+endpoint = f"https://api.covid19api.com/country/{country}/status/confirmed"
 params = {"from": str(yesterday), "to": str(today)}
 
+# The response will be a list of results per day, in your case only 1 result.
 response = requests.get(endpoint, params=params).json()
+
+# Finally, you need to traverse through the response and increment the `total_confirmed` variable
+# with the total number of confirmed cases available that day, which is in the field `Cases`.
 total_confirmed = 0
-for region in response:
-    cases = region.get("Cases", 0)
+for day in response:
+    cases = day.get("Cases", 0)
     total_confirmed += cases
 
-print("Total Confirmed COVID cases in %s: %s" % (country, total_confirmed))
+print(f"Total Confirmed Covid-19 cases in {country}: {total_confirmed}")