第三章作业

3-1:
names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name)3-2:

names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ", Good afternoon!")3-3:

names = ['bike', 'motorcycle', 'metro', 'car']for name in names: print('I would like to own a ' + name.title()) 3-4:

names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ', 想和我共进晚餐吗？')3-5:

names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ', 想和我共进晚餐吗？')print("啊哦，John来不了。")names[0] = 'Mary'for name in names: print(name + ', 想和我共进晚餐吗？')3-6

names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ', 想和我共进晚餐吗？')print("啊哦，John来不了。")names[0] = 'Mary'for name in names: print(name + ', 想和我共进晚餐吗？')print('唔！我找到一个更大的餐桌了。')names.insert(0, 'Jay')names.insert(2, 'Jair')names.append('Willian')for name in names: print(name + ', 想和我共进晚餐吗？')
3-7

names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ', 想和我共进晚餐吗？')print("啊哦，John来不了。")names[0] = 'Mary'for name in names: print(name + ', 想和我共进晚餐吗？')print('唔！我找到一个更大的餐桌了。')names.insert(0, 'Jay')names.insert(2, 'Jair')names.append('Willian')for name in names: print(name + ', 想和我共进晚餐吗？')print("实在对不起，我只能邀请两名嘉宾。")for i in range(0, 5): print(names.pop() + "，对不起，我无法邀请你来共进晚餐！")for name in names: print(name + "，你在受邀之列！")del names[0]del names[0]print(names)3-8

places = ['New York', 'Beijing', 'Tokyo', 'Los Angeless', 'Washington']print(places)print(sorted(places))print(places)print(sorted(places, reverse=True))print(places)places.reverse()print(places)places.reverse()print(places)places.sort()print(places)places.sort(reverse=True)print(places)3-9

#练习3-6names = ['John', 'Bob', 'James', 'Alan']for name in names: print(name + ', 想和我共进晚餐吗？')print("啊哦，John来不了。")names[0] = 'Mary'for name in names: print(name + ', 想和我共进晚餐吗？')print('唔！我找到一个更大的餐桌了。')names.insert(0, 'Jay')names.insert(2, 'Jair')names.append('Willian')for name in names: print(name + ', 想和我共进晚餐吗？')print(len(names))