《Python编程：从入门到实践》第三章 列表简介 习题答案

#3.1
names=['lpr','tjl','gnl','by','dqy'];
print(names[0]);
print(names[1]);
print(names[2]);
print(names[3]);
print(names[4]);

#3.2
print(names[0]+",Hello!");
print(names[1]+",Hello!");
print(names[2]+",Hello!");
print(names[3]+",Hello!");
print(names[4]+",Hello!");

#3.3
transport=['bike','high-way','bus','taxi','plane'];
print("I would like to own a "+transport[0]);
print("I would like to own a "+transport[1]);
print("I would like to own a "+transport[2]);
print("I would like to own a "+transport[3]);
print("I would like to own a "+transport[4]);

#3.4
friends=['by','xdy','lyx'];
print("Hello,"+friends[0]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[1]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[2]+"! I would like to invent you to have dinner with me!");

#3.5
print(friends[1]+" cannot come here for dinner!");
friends[1]='dqy';
print("Hello,"+friends[0]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[1]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[2]+"! I would like to invent you to have dinner with me!");

#3.6
print("Hello,my friends!I have got a bigger desk for dinner just now,let's invent more 3 fridens!");
friends.insert(0,'lpr');
friends.insert(2,'nsx');
friends.append('gj');
print("Hello,"+friends[0]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[1]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[2]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[3]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[4]+"! I would like to invent you to have dinner with me!");
print("Hello,"+friends[5]+"! I would like to invent you to have dinner with me!");

#3.7
print("Sorry,I could only invent 2 friends for dinner!");
sorry=friends.pop();
print(sorry+",I am so sorry that you can't have dinner with me tonight!");
sorry=friends.pop();
print(sorry+",I am so sorry that you can't have dinner with me tonight!");
sorry=friends.pop();
print(sorry+",I am so sorry that you can't have dinner with me tonight!");
sorry=friends.pop();
print(sorry+",I am so sorry that you can't have dinner with me tonight!");
print("-----------------------------------------");
print(friends[-1]+",you can have dinner here,enjoy yourselves!");
print(friends[-2]+",you can have dinner here,enjoy yourselves!");
print("-----------------------------------------");
del friends[0];
del friends[0];
print(friends);

#3.8
dreamPlace=['Tokyo','Xiamen','Linzhi','London','Paris'];
print(dreamPlace);
 #此处注意，sorted()函数的调用方式是把列表名作为参数传给sorted
print(sorted(dreamPlace));
print(sorted(dreamPlace,reverse=True));
 #注意此处的reverse()函数的返回值不可以用变量接收
dreamPlace.reverse();
print(dreamPlace);
dreamPlace.reverse();
print(dreamPlace);

dreamPlace.sort();
print(dreamPlace);
dreamPlace.sort(reverse=True);
print(dreamPlace);

#3.9
print(dreamPlace[10]);