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POPython - list.remove(x) x not in list
 

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    <p>I am trying to create a simple program in Python 3.3 that takes a list of four names, and randomly assigns them to another person in the list. For example, if the names were John, Aaron, Lydia, and Robin:</p> <p>John goes first and selects a name. He cannot draw his own; if he does, he puts it back and draws again. Say John drew Robin's name. Robin's name would be eliminated from the pool. Next is Aaron's turn to draw. He draws John. John's name is eliminated. etc. until all names are assigned.</p> <p>I created a list with four names and assigned each one a value 1-4. However, i'm running into an issue when removing from a list, saying the value does not exist.</p> <p>list.remove(x) : x not in list.</p> <p>it looks something like this:</p> <pre><code>def drawNames(): import random John=1 Aaron=2 Lydia=3 Robin=4 validNames=[John, Aaron, Lydia, Robin] nameDrawn=random.choice(validNames) def draw(): nameDrawn=random.choice(validNames) #John's Draw: draw() if nameDrawn != 1: if nameDrawn == 2: print("John drew: Aaron") validNames.remove(2) elif nameDrawn == 3: print("John drew: Lydia") validNames.remove(3) elif nameDrawn == 4: print("John drew: Robin") validNames.remove(4) #Aaron's Draw: draw() if nameDrawn !=2: if nameDrawn ==1: print("Aaron drew: John") validNames.remove(1) elif nameDrawn ==3: print("Aaron drew: Lydia") validNames.remove(3) elif nameDrawn ==4: print("Aaron drew: Robin") validNames.remove(4) #Lydia's Draw: draw() if nameDrawn !=3: if nameDrawn ==1: print("Lydia drew: John") validNames.remove(1) elif nameDrawn ==2: print("Lydia drew: Aaron") validNames.remove(2) elif nameDrawn ==4: print("Lydia drew: Robin") validNames.remove(4) #Robin's Draw: draw() if nameDrawn !=4: if nameDrawn ==1: print("Robin drew: John") validNames.remove(1) elif nameDrawn ==2: print("Robin drew: Aaron") validNames.remove(2) elif nameDrawn ==3: print("Robin drew: Lydia") validNames.remove(3) drawNames() </code></pre> <p>i've also tried using the names rather than the numeric values, which yielded the same error.</p> <p>I also feel like this is an inefficient scheme. If you have a better suggestion I'd be much obliged. </p>
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    1. CO[related question](http://stackoverflow.com/questions/15096157/how-to-shuffle-an-array-so-that-all-elements-change-their-place)
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    2. COIs this like a "White elephant" or "Secret Santa" drawing? Would you like to prevent two people from picking each other?
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