Question

我有两个字典，我想比较主机词典中的 srvuuid 和备份中的 srvuuidorg 字典。

这是主持人：

hosts = {}
for d in data['servers']['server']:
    srvhostname = d['hostname']
    srvuuid = d['uuid']
    hosts[srvhostname] = srvuuid

这是备份：

backup = {}
for u in backup_list['storages']['storage']:
    srvuuidorg = u['origin']
    backup_status = u['state']
    backup[srvuuidorg] = backup_status

我提取计算机主机名，然后检查该主机名是否存在于 hosts 词典中，并使用 srvuuid

获取输出

hostname = gethostname()
print(hostname)
for srvhostname in hosts:
  if srvhostname != hostname:
    continue
  if srvhostname == hostname:
    print(srvhostname + " : " + hosts[srvhostname])
    break
  else:
    print("There is no matching hostname or uuid.")

最后，我想比较 srvuuid 和 srvuuidorg 。下面的代码不起作用，这意味着执行时没有输出：

for srvuuidorg in backup:
  if srvuuidorg != srvuuid:
      continue
  if srvuuidorg == srvuuid:
      print("Status for " + srvuuidorg + " is " + backup_status)
      break
  else:
      print("No maching uuid found.")

我应该如何比较这本词典中的两个值，或者应该更改主题的方法并使用与比较词典不同的方式？

Answer 1

我认为您可能想要的是：

srvuuid_match = False

for srvuuidorg in backup:
    if srvuuidorg == srvuuid:
        print("Status for " + srvuuidorg + " is " + backup[srvuuidorg])
        srvuuid_match = True
        break

if srvuuid_match is False:
    print("No maching uuid found.")

这将打印备份字典的srvuuidorg键上存储的值。我认为您遇到的问题是您使用的是先前代码块中的旧的backup_status值，而不是存储在backup [srvuuidorg] dict和密钥上的backup_status的正确值。

但是，没有必要循环。您可以这样做：

if srvuuid in backup:
    print("Status for " + srvuuidorg + " is " + backup[srvuuid])
else:
    print("No maching uuid found.")

如果srvuuidorg == srvuuid（即备份字典中存在srvuuid键），这将打印备份字典中srvuuid键上存储的值。那可能是一个更好的方法。希望有帮助！

Answer 2

您无需遍历字典即可查看是否存在密钥，查找时间为O(1)：

hostname = gethostname()
print(hostname)

if hostname in hosts:
    print(srvhostname + " : " + hosts[hostname])
    #srvuuid = hosts[hostname]                      ## I'm just guessing here 
else:
    print("There is no matching hostname or uuid.")

if srvuuid in backup:
    print("Status for " + backup[srvuuid] + " is " + backup_status)
else:
    print("No maching uuid found.")

无法比较Python中两个字典的变量

2 个答案: