《Python编程-从入门到实践》课后习题(5)
2018-03-21 20:15
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6-1
someone = { 'first_name': 'Ann', 'last_name': 'White', 'age': 18, 'city': 'York' } print(someone)
6-2
guysandnums = { 'Ann': '1', 'Ben': '2', 'Cathy': '3', 'David': '4', 'Eric': '5' } for guy, num in guysandnums.items(): print(guy + ' love ' + num)
6-3
words = { 'key': 'a key', 'value': 'a value', 'list': 'a list', 'dic': 'dictionary', 'code': 'code' } for word, meanning in words.items(): print(word + ' means ' + meanning)
6-4
words = { 'key': 'a key', 'value': 'a value', 'list': 'a list', 'dic': 'dictionary', 'code': 'code' } for word, meanning in words.items(): print(word + ' means ' + meanning)
6-5
dic = { 'Nile': 'Egypt', 'Amazon': 'Brasil', 'Yellow River': 'China', } for river, country in dic.items(): print('The ' + river + ' runs through ' + country) for river in dic.keys(): print(river) for country in dic.values(): print(country)
6-6
guys = { 'A': True, 'B': False, 'C': True, 'D': True, 'E': False } for guy in guys.keys(): if guys[guy]: print('Thank you! ' + guy) else: print('Can I help you? ' + guy)
6-7
guy1 = { 'first_name': 'Ann', 'last_name': 'White', 'age': 18, 'city': 'York' } guy2 = { 'first_name': 'Ben', 'last_name': 'Black', 'age': 28, 'city': 'New York' } guy3 = { 'first_name': 'Cathy', 'last_name': 'Pinkman', 'age': 12, 'city': 'London' } guys = [guy1, guy2, guy3] for guy in guys: print( 'First name: ' + guy['first_name'] + '\n' 'Last name: ' + guy['last_name'] + '\n' 'Age: ' + str(guy['age']) + '\n' 'city: ' + guy['city'] + '\n' )
6-8
Cat1 = { 'species': 'cat', 'owner': 'Ann' } Dog2 = { 'species': 'dog', 'owner': 'Ben' } Bird3 = { 'species': 'bird', 'owner': 'Eric' } pets = [Cat1, Dog2, Bird3] for pet in pets: print(pet)
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