有关python的字典以及对象什么的一些小技巧_python字典转换成对象的小技巧-优快云博客

本文链接：https://blog.youkuaiyun.com/u010023413/article/details/39349541

本文通过一个具体的Python代码示例展示了如何正确地使用深拷贝来为不同的对象分配独立的字典副本，避免了因引用共享导致的数据污染问题。

people = {'name':'',"homework":[],"quizzes":[],"tests":[]}
lloyd = people
alice = people
tyler = people
lloyd['name'] = "Lloyd"
alice['name'] = "Alice"
tyler['name'] = "Tyler"
print lloyd

这个来自codecademy的一段教学...(当然整个代码都是我自己敲的..)

然而这样写的结果是lloyd people等等都是一个变量..= =

如果要达到目标效果那么要写成这样

people = {'name':'',"homework":[],"quizzes":[],"tests":[]}
lloyd = people.copy()
alice = people.copy()
tyler = people.copy()
lloyd['name'] = "Lloyd"
alice['name'] = "Alice"
tyler['name'] = "Tyler"
print lloyd

其中这里的关键是 python里的实例名往往指的都是类似于c++的引用

顺手发一个很好玩的东西~（当然这个可以认为是原创或者非原创啦...）

from random import randint

board = []

for x in range(5):
    board.append(["O"] * 5)

def print_board(board):
    for row in board:
        print " ".join(row)

print "Let's play Battleship!"
print_board(board)

def random_row(board):
    return randint(0, len(board) - 1)

def random_col(board):
    return randint(0, len(board[0]) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col

# Everything from here on should go in your for loop!
# Be sure to indent four spaces!
for turn in range(4):
    print "Turn", turn + 1
    guess_row = int(raw_input("Guess Row:"))
    guess_col = int(raw_input("Guess Col:"))
    
    if guess_row == ship_row and guess_col == ship_col:
        print "Congratulations! You sunk my battleship!"
        break
    else:
        if (guess_row < 0 or guess_row > 4) or (guess_col < 0 or guess_col > 4):
            print "Oops, that's not even in the ocean."
        elif(board[guess_row][guess_col] == "X"):
            print "You guessed that one already."
        else:
            print "You missed my battleship!"
            board[guess_row][guess_col] = "X"
            if turn == 3:
                print "Game Over"
        # Print (turn + 1) here!