參數沒有得到正確傳遞

這裏是我的代碼的摘錄：參數沒有得到正確傳遞

def listFrom(here): 
    print "[DBG] here: " + here 

def book(here, there, amount): 
    print "[DBG] here: " + here + "; there: " + there + "; amount: " + str(amount) 

# Code that takes input and stores it into the string input 

# Yes, I know this is dangerous, but it's part of a 
# school assignment where we HAVE to use eval. 
eval(input, {"__builtins__": {}, "listAll": listAll, "listFrom": listFrom, "listFromTo": listFromTo, "book": book, "about": about, "commands": commands, "book": book})

如果我進入listFrom('LON')，按預期程序返回[DBG] here: LON。但是，當我做book('LON', 'MAN', 8)時，我收到了一個莫名其妙的[DBG] here: ☺; there: ☻; amount: ♥。這可能是什麼原因？

來源

2010-02-27 Pieter

你在哪裏看輸出？你可以發佈IDLE會話嗎？否則無法複製 – SilentGhost 2010-02-27 12:43:28

無法複製。什麼Python和哪個平臺？ – 2010-02-27 12:43:50

它似乎對我來說工作正常;你可以發佈你用來獲取用戶輸入的代碼嗎？另外，我會調用字符串變量而不是'input'，這是內置函數之一。您使用的是什麼版本的Python？ – tzaman 2010-02-27 12:57:58

此代碼的工作沒有任何問題在Python 2.6在Linux/X86-32：

>>> def listFrom(here): 
...  print "[DBG] here: " + here 
... 
>>> def book(here, there, amount): 
...  print "[DBG] here: " + here + "; there: " + there + "; amount: " + str(amount) 
... 
>>> book('LON', 'MAN', 8) 
[DBG] here: LON; there: MAN; amount: 8 
>>> input = """book('LON', 'MAN', 8)""" 
>>> eval(input, {"__builtins__": {}, "listFrom": listFrom, "book": book}) 
[DBG] here: LON; there: MAN; amount: 8 
>>> eval("""listFrom('LON')""", {"__builtins__": {}, "listFrom": listFrom, "book": book}) 
[DBG] here: LON

什麼Python版本您使用的？在哪個OS /體系結構上？

來源

2010-02-27 12:50:17

哦拍，你說得對。我隔離的代碼工作正常，但我做了一些古怪的東西，導致'eval'在某些情況下根本不被執行。 – Pieter 2010-02-27 13:26:53

參數沒有得到正確傳遞

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