Question

我一直在寻找，但我找不到任何描述我问题的东西。我只是在学习python，所以我甚至不知道如何正确地表达这个问题。

我试图随机选择一些已定义的变量，但我无法弄清楚如何检索这些变量。例如：

import random

user1 = "usernamehere1"
userkey1 = "3097fds09aj4023jr30mf2ag2"
user2 = "usernamehere2"
userkey2 = "09asfh34907fsenk32498fgg9"
user3 = "usernamehere3"
userkey3 = "234kn34bnero8wn34lnkjwi34"

numbers =  ["1", "2", "3"]

user_number = random.choice(numbers)
user = "user" + user_number
wif = "userkey" + user_number

print(user)
print(wif)

而不是:(如果它选择＆＃34; 2＆＃34;作为随机数）：

usernamehere2
09asfh34907fsenk32498fgg9

我得到：

用户2
userkey2

我猜错了什么？

Answer 1

查看这篇文章To convert string to variable name，您可以使用exec将字符串更改为变量，但这不安全，绝对不建议使用。正如这里的帖子所解释的那样，您应该使用词典代替users["user" + user_number]

import random

user1 = "usernamehere1"
userkey1 = "3097fds09aj4023jr30mf2ag2"
user2 = "usernamehere2"
userkey2 = "09asfh34907fsenk32498fgg9"
user3 = "usernamehere3"
userkey3 = "234kn34bnero8wn34lnkjwi34"

dict = {}
dict[user1] = userkey1
dict[user2] = userkey2
dict[user3] = userkey3

numbers =  ["1", "2", "3"]

user_number = random.choice(numbers)
user = "user" + user_number

print(user)
print(dict[user])

Answer 2

评论是正确的，我只是想分享一种方法来实现它们。您可以将字典视为“查找表”，您可以在其中指定键 - ＆gt;值对。有很多信息here

import random

users = {"1":"usernamehere1",
         "2":"usernamehere2",
         "3":"usernamehere3"}

keys = {"1":"3097fds09aj4023jr30mf2ag2",
        "2":"09asfh34907fsenk32498fgg9",
        "3":"234kn34bnero8wn34lnkjwi34"}

numbers =  ["1", "2", "3"]

user_number = random.choice(numbers)
user = "user" + users[user_number]
wif = "userkey" + keys[user_number]

print(user)
print(wif)

Answer 3

import random
users = [
        {
            'user':"usernamehere1",
            'userkey':"3097fds09aj4023jr30mf2ag2"
        },
        {
            'user':"usernamehere2",
            'userkey':"09asfh34907fsenk32498fgg9"
        },
        {
            'user':"usernamehere3",
            'userkey':"234kn34bnero8wn34lnkjwi34"
        }
    ]

user_number = random.choice(range(1,len(users)))

print(users[user_number]['user'])
print(users[user_number]['userkey'])

Answer 4

您可以只使用一个字典：

import random

users = {
    "usernamehere1": "3097fds09aj4023jr30mf2ag2",
    "usernamehere2": "09asfh34907fsenk32498fgg9",
    "usernamehere3": "234kn34bnero8wn34lnkjwi34"
}

user = random.sample(users.keys(), 1)

print(user[0])
print(users[user[0]])

Python如何连接和检索实际定义的数据？

4 个答案: