python - 'builtin_function_or_method' 对象没有属性 'randrange'

Question

我有一个奇怪的问题，

我已经创建了以下代码来随机生成 1 和 x 之间的数字，增量为 1 并存储它们

import random

bootstrap_node_list_recieved = [] #List of all nodes addresses recieved during the bootstrap peroid - Is a list so we can compare duplicatition probability etc
average_getAdrr_no_node_response = 100 #Number or nodes typically sent when a node requests a getAddr message
network_ip_node_size = 5000 # Number of IP addresses / nodes that have been seen on the network in the past 2 weeks


#Move into calculations.py when ready
#Number of nodes recieved (Bootstrap)
def bootstrap_node_getAddr():
    #### TODO ####
    #Random generation of nodes (number represents a single node), from 1 to x for an average amount of nodes
    # node_list=[random.randrange(1,network_ip_node_size,1) for _ in range (average_getAdrr_no_node_response)]
    for i in range (average_getAdrr_no_node_response):
        bootstrap_node_list_recieved.append(random.randrange(1,network_ip_node_size,1))
    print 'bootstrap_node_getAddr: ', bootstrap_node_list_recieved
    # return bootstrap_node_list_recieved

bootstrap_node_getAddr()

这段代码本身运行良好，但是当我将它插入到我的主代码库中时出现错误

Traceback (most recent call last):
  File "BootstrapBTC.py", line 117, in query_dns_servers
    bootstrap_node_getAddr()
  File "/home/richard/Dropbox/PhD/Simulator BTC - Ours/Calculations.py", line 33, in bootstrap_node_getAddr
    bootstrap_node_list_recieved.append(random.randrange(1,network_ip_node_size,1))
AttributeError: 'builtin_function_or_method' object has no attribute 'randrange'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "BootstrapBTC.py", line 90, in run
    yield self.env.process(query_dns_servers(env, self))
AttributeError: 'builtin_function_or_method' object has no attribute 'randrange'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "BootstrapBTC.py", line 178, in <module>
    env.run()
  File "/usr/local/lib/python2.7/dist-packages/simpy/core.py", line 137, in run
    self.step()
  File "/usr/local/lib/python2.7/dist-packages/simpy/core.py", line 229, in step
    raise exc
AttributeError: 'builtin_function_or_method' object has no attribute 'randrange

第90行的代码是

    yield self.env.process(query_dns_servers(env, self))

它只是调用

#Average respsonse time from a DNS server
def DnsServerResponse(env, self):
    yield self.env.timeout(dns_average_response)

它在模拟时间中附加了一个随机值，我不认为它与这行代码有任何关系，因为它根本不使用随机库，事实上插入的代码是迄今为止唯一的使用库

有人知道问题出在哪里吗？这让我发疯!

谢谢!

尝试将我的导入更改为随机导入，现在得到:

Traceback (most recent call last):
  File "BootstrapBTC.py", line 102, in query_dns_servers
    DnsUp = DnsUpProbability()
  File "/home/richard/Dropbox/PhD/Simulator BTC - Ours/Calculations.py", line 39, in DnsUpProbability
    up = (0 if random() > Prob_DNS_UP else 1)
TypeError: 'module' object is not callable

Answer 1

错误是因为您很可能将 random 分配给代码中某处的另一个值，覆盖了 random 模块的原始 random。

尝试检查您的代码，看看您还随机分配了什么。或者你可以通过这样做来检查它:在你使用随机之前

print(random, type(random))

解决此问题的另一种方法是，如果您的代码太长且难以检查，您可以像这样导入随机:使用 import...as... 格式。

import random as rand
# and when using it, type rand instead of random
bootstrap_node_list_recieved.append(rand.randrange(1,network_ip_node_size,1))

您还应该检查您的 sys.path 中是否有任何名为 random.py 的文件。