Python全局变量不起作用

Question

I have an extremely long program for a Canasta game that I am writing, in it there is a variable that ends the turn of the player if it equals a certain value. However, the turn repeats itself.

I have read many different articles and posts on forums like this one, but none of these seem to work. I even have a debug system to print the value of the variable before the if statement, and the variable is the right value, but the if statement doesn't see the same value.

I can't give the entire code, as it is extremely long, but I can give the sections that use this variable. I am using Python 2.7.2 and cannot make files separate from the main file to import.

The first line of the program is:

endTurn=1

The following function is called when conditions to win the game are met, but I have not been able to test that this works because of the bug.

def winGame(player):
    global endTurn
    gameWinner=player
    gameWinner["score"]+=100
    endTurn=0

The following function is called when a move is made. The variable decide is a raw_input() variable.

def move(player,decide):
    global endTurn
    theMove=decide.lower()
    #if player says to end turn
    if theMove=="end":
        #until player discards something
        discarded=0
        while not discarded:
            displayHand(player)
            #ask player for discard
            discard=int(raw_input(" Enter the list number of the card you wish to discard:"))-1
            #if discard ID is in player's hand length
            if not discard<0 and not discard>len(player["hand"])-1:
                #add card to discard pile and remove from hand
                discardPile.append(player["hand"][discard])
                del(player["hand"][discard])
                discarded=1
        debug("Before changing, endTurn is %s"%str(endTurn))
        endTurn = 0
        debug("After changing, endTurn is %s"%str(endTurn))
    if theMove=="new book":
        newBook(player)
    if theMove=="add to book":
        addBook(player)

Here is where the turn should be ended. turn(thePlayer) repeats the function. The debug statement shows the correct value, 0, but the if still reads a 1. The function this is in also has the global endTurn at the top.

debug("If ending turn, endTurn of %s should be 0."%str(endTurn))
if endTurn==1:
    turn(thePlayer)

Any help is greatly appreciated!

EDIT: The code is available at http://labs.codecademy.com/CV9z#:workspace . I ask that anyone viewing the code does not modify it, so that other people can see the true code.

Answer 1

I fixed the bug. I removed the endTurn variable and instead made the function that ends the turn just do the turn of the next player. It also simplified my code a bit.

I am wondering though, is using this method of running a function inside of itself over and over and over again (without leaving) rather messy or maybe slowing down my program?

EDIT: I now realize that this answer does not exactly help with anyone else who is stuck with global variables...

Answer 2

The previous answer I posted was just wrong, as it was based on a misinterpretation of the namespace docs as I had read them (Thanks to TheifMaster for pointing out my error), so this is a SEVERELY EDITED ANSWER:

The problem is in the while loop that I was able to read when the link to the entire code was posted after the erroneous answer I gave earlier.

while gameWinner==0:
    endTurn=1
    turn(player1)
    if not gameWinner==0:
        endTurn=1
        turn(player2)

The game can never get to player two in this loop until gameWinner!=0. I added the entire code to my sandbox and changed it to:

while gameWinner==0:
    endTurn=1
    turn(player1)
    if gameWinner==0: #if player1 did not win yet
        endTurn=1
        turn(player2)

However, the game is still buggy... No one can win! gameWinner is not changed globally by the winGame() function until you add it to the global statement as I have shown here.

def winGame(player):
    global endTurn, gameWinner
    gameWinner=player
    gameWinner["score"]+=100
    debug("gameWinner == " + str(gameWinner))
    endTurn=0