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"""

metro_lat_long.py

Demonstration of nested tuple unpacking::

>>> main()

| latitude | longitude

Mexico City | 19.4333 | -99.1333

New York-Newark | 40.8086 | -74.0204

São Paulo | -23.5478 | -46.6358

"""

# tag::MAIN[]

metro_areas = [

('Tokyo', 'JP', 36.933, (35.689722, 139.691667)),

('Delhi NCR', 'IN', 21.935, (28.613889, 77.208889)),

('Mexico City', 'MX', 20.142, (19.433333, -99.133333)),

('New York-Newark', 'US', 20.104, (40.808611, -74.020386)),

('São Paulo', 'BR', 19.649, (-23.547778, -46.635833)),

]

def main():

print(f'{"":15} | {"latitude":>9} | {"longitude":>9}')

for record in metro_areas:

match record: # <1>

case [name, _, _, (lat, lon)] if lon <= 0: # <2>

print(f'{name:15} | {lat:9.4f} | {lon:9.4f}')

# end::MAIN[]

if __name__ == '__main__':

main()