64_dictionary_comprehension.py

# dictionary comprehension = create dictionary using an expression
#                            can replace for loops and certain lambda functions

# dictionary = {key: expresion for (key,value) in iterable}
# dictionary = {key: expresion for (key,value) in iterable if contitional}
# dictionary = {key: (if/else0) expresion for (key,value) in iterable}


cities_in_F = {'New York': 32, 'Boston': 75, 'Los Angeles': 100, 'chicago': 50}

cities_in_C = {key: round((value-32)*(5/9)) for (key,value) in cities_in_F.items()}
print(cities_in_C)


weather = {'New York': "snowing", 'Boston': "sunny", 'Los Angeles': "sunny", 'Chicago': "cloudy"}
sunny_weather = {key: value for (key,value) in weather.items() if value == "sunny"}
print(sunny_weather)


def check_temp(value):
    if value >= 70:
        return "HOT"
    elif 69>= value >= 40:
        return "COLD"
    else:
        return "COLD"

cities = {'New York': 32, 'Boston': 75, 'Los Angeles': 100, 'chicago': 50}
# desc_cities = {key: ("WARM" if value >= 40 else "COLD") for (key,value) in cities.items()}
desc_cities = {key: check_temp(value) for (key,value) in cities.items()}
print(desc_cities)