et read_routes (routes_source: TextI0, airports: AirportDict) -> RouteDict: """Return the flight routes from routes_source, including only the ones that have an entry in airports. If there are multiple routes between routes_source and a destination (on different airlines for example), include the destination only once. Routes that include null airport IDs should still be included, but routes that have empty IATA should be excluded. >>> from io import StringIO >>> routes_src = StringIO(TEST_ROUTES_SRC) >>> actual = >>> actual == True routes = {} src_index = dst_index - read_routes (routes_src, TEST AIRPORTS_DICT) TEST ROUTES_DICT_FOUR_CITIES ROUTE_DATA_INDEXES["Source airport"] ROUTE_DATA_INDEXES["Destination airport"] # Complete this function. # Note that each value in the resulting Hictionary is a set of IATA codes.

et read_routes (routes_source: TextI0, airports: AirportDict) -> RouteDict: """Return the flight routes from routes_source, including only the ones that have an entry in airports. If there are multiple routes between routes_source and a destination (on different airlines for example), include the destination only once. Routes that include null airport IDs should still be included, but routes that have empty IATA should be excluded. >>> from io import StringIO >>> routes_src = StringIO(TEST_ROUTES_SRC) >>> actual = >>> actual == True routes = {} src_index = dst_index - read_routes (routes_src, TEST AIRPORTS_DICT) TEST ROUTES_DICT_FOUR_CITIES ROUTE_DATA_INDEXES["Source airport"] ROUTE_DATA_INDEXES["Destination airport"] # Complete this function. # Note that each value in the resulting Hictionary is a set of IATA codes.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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