python - 使用 import random，使用 random.choice 抛出 AttributeError

Question

所以，我遇到了一个非常奇怪的错误。出于某种原因，python 没有将 random 作为模块导入，在我看来，它是作为函数( as seen here )导入的。为什么要这样做？使用 import random 和 random.choice() 在其他模块中工作正常。为什么不在这里？

更新:原来我在 logic.py 中再次定义了随机数。我忘了我这样做了，因为我不再使用它了。将其注释掉，它工作正常。

回溯:

Traceback (most recent call last):
  File "H:\workspace37\RockPaperScissors\irps\driver.py", line 20, in <module>
    print "%r" % dtree.root.get_value(history)
  File "H:\workspace37\RockPaperScissors\irps\datastructures.py", line 69, in get_value
    return self.operation(self.left.get_value(history), self.right.get_value(history))
  File "H:\workspace37\RockPaperScissors\irps\datastructures.py", line 69, in get_value
    return self.operation(self.left.get_value(history), self.right.get_value(history))
  File "H:\workspace37\RockPaperScissors\irps\logic.py", line 53, in either
    return random.choice((a, b))
AttributeError: 'function' object has no attribute 'choice'

我试图包含相关的代码。

逻辑.py:

import random 
#from random import choice # works if I change random.choice(...) to just choice(...)

ROCK = 'R'
PAPER = 'P'
SCISSORS = 'S'
RPS_TUPLE = (ROCK, PAPER, SCISSORS)
RPS_SET = set((ROCK, PAPER, SCISSORS))
PLAYER = 0
OPPONENT = 1
PLAYERS = (PLAYER, OPPONENT)

def assert_in_set(a, b):
    assert a in RPS_SET
    assert b in RPS_SET

def neither(a, b):
    assert_in_set(a, b)
    diff = RPS_SET.difference((a, b))
    print "diff = ", diff
    return random.choice(tuple(diff))

def either(a, b):
    assert_in_set(a, b)
    return random.choice((a, b)) #line 53

#EDITED TO INCLUDE THESE LINES FURTHER DOWN
def random(a, b):
    return random.choice(RPS_TUPLE)

ALL_OPERATORS = (neither, either)

数据结构.py

from collections import deque
from logic import RPS_TUPLE, ALL_OPERATORS, PLAYERS
import random
import sys

class OperationNode(TreeNode):

    def __init__(self, parent, left, right, operation):
        super(OperationNode, self).__init__(parent, left, right)
        self.operation = operation

    def get_value(self, history):
        return self.operation(self.left.get_value(history), self.right.get_value(history)) # line 69


class TerminalNode(TreeNode):

    def __init__(self, parent, player, position):
        super(TerminalNode, self).__init__(parent, None, None)
        self.player = player
        self.position = position

    def get_value(self, history):
        # history is a deque of tuples
        return history[self.position][self.player]

Answer 1

你在logic.py中定义了随机函数吗？

这可能是问题的原因。

>>> def random():
...     pass
...
>>> random.choice
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'function' object has no attribute 'choice'