Get the historical cases by day for a UK region as used in coronavirus.data.gov.uk (that only displays the latest value for a region)

uk_covid_tracker.py

#!/usr/bin/env python3

import urllib.request
import json
import sys
import argparse

# Used in https://coronavirus.data.gov.uk
URL='https://c19downloads.azureedge.net/downloads/data/ltlas_latest.json'

def main():
    p = argparse.ArgumentParser(description="Get the historical cases by day  for a UK region as used in coronavirus.data.gov.uk")
    p.add_argument('--region', default='Oxford', help='Region to print daily new cases')
    args  = p.parse_args()
    target_region = args.region
    with  urllib.request.urlopen(URL) as f:
        data = f.read()
    parsed = json.loads(data)
    for region in parsed.values():
        region_name=region.get('name', {}).get('value')
        if region_name != target_region:
            continue
        new_cases = sorted([(i['date'], i['value'])
                        for i in region['dailyConfirmedCases']],
                       key=lambda t: t[0])
        total_cases = sorted([(i['date'], i['value'])
                        for i in region['dailyTotalConfirmedCases']],
                       key=lambda t: t[0])
        assert list(zip(*new_cases))[0] == list(zip(*total_cases))[0]
        print(f'Cases for {target_region}')
        print('date,new,total')

        for new, total in zip(new_cases, total_cases):
            print(new[0], new[1], total[1])
        break
    else:
        all_regions = sorted([r.get('name', {}).get('value', '') for r in parsed.values()])
        print(f'Could not find region {target_region}, the  following  are available {all_regions}')


if __name__ == "__main__":
    main()