遍历字典

    xiaoxiao2021-04-15  345

    print("----") user_0 = { 'username':'efermi', 'first':'enrico', 'last':'fermi', } for key,value in user_0.items(): print('\nkey:'+key) print('value:'+value) print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } for name,language in favorite_languages.items(): print(name.title() + "'s favorite language is " + language.title() + '.') print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } friends = {'phil','sarah'} for name in favorite_languages.keys(): print(name.title()) if name in friends: print(" Hi " + name + ", I see your favorite language is "+ favorite_languages[name].title() + "!") print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } if 'erin' not in favorite_languages.keys(): print("Erin, please take our poll!") print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } for name in sorted(favorite_languages.keys()): print(name.title() + ", thank you for taking the poll") print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } print("The following languages have been mentioned:") for language in favorite_languages.values(): print(language.title()) print('----') favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } print("The following languages have been mentioned:") for language in set(favorite_languages.values()): print(language.title()) print("====") dics = { 'if':'if.', 'print': 'print some text', 'for': 'for loop', 'str': 'str to string', 'and': 'and.', } for key,value in dics.items(): print(key + ": " + value + ".") dics['value'] = "value" dics['class'] = "class" dics['int'] = "int" dics['float'] = "float" dics['short'] = "short" print("\n") for key,value in dics.items(): print(key + ": " + value + ".") print("====") items = { 'nile':'egypt', 'chang river':'china', 'yalv river':'korea' } for river,country in items.items(): print("The " + river.title() + " runs through " + country.title() + ".") for river in items.keys(): print(river.title()) for country in items.values(): print(country.title()) print("====") favorite_languages = { 'jen':'python', 'sarah':'c', 'edward':'ruby', 'phil':'python', } names = ['jen','PiaoYongyou'] for name in favorite_languages.keys(): if name in names: print("Thank you, " + name) else: print("Please come in, " + name)

     


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