TypeError:在尝试从字典访问值时，字符串索引必须是整数

Question

我有一本这样的字典：

data = {
   "4.3.0 Test Plan":{
      "Engine":{
         "passed_count":0,
         "blocked_count":0,
         "untested_count":4088,
         "failed_count":0,
         "reviewed_count":0,
         "test_harness_issue_count":0,
         "bug_failure_count":0,
         "defect_list":[

         ]
      },
      "Management Web Console":{
         "passed_count":0,
         "blocked_count":0,
         "untested_count":12067,
         "failed_count":0,
         "reviewed_count":0,
         "test_harness_issue_count":0,
         "bug_failure_count":0,
         "defect_list":[

         ]
      }
   }
}

通过这样做，我试图访问这两个类别的untested_count值：

for value in data["4.3.0 Test Plan"]:
    print(value)
    print(value['untested_count'])

但是我收到了这行的错误TypeError: string indices must be integers，print(value['untested_count'])

并从同一行的python Expected type 'Union[int, slice]', got 'str' instead中接收到此错误

我对此感到困惑，对于此示例的任何帮助和解释都将不胜感激。

注意:上述for循环中的print(value)工作，并将返回：

Engine
Management Web Console

预期成果：

Engine
4088
Management Web Console
12067

Answer 1

您正在遍历字典的keys，而可以使用items()在keys和values上进行迭代。

for key, value in data["4.3.0 Test Plan"].items():
   print(key)
   print(value['untested_count'])

输出：

Engine
4088
Management Web Console
12067