How to parse through json in Python with dynamic key names?

It is possible using dictionary values() or items() methods, given that the structure is as in the example.

import json

json_string = """
{
   "host" : {
      "ip-10-12-68-170.b2c.test.com" : {
         "environment" : {
            "testing1" : {
               "ip" : "ip-10-12-68-170",
               "name" : "testing",
               "env.root" : "/",
               "host" : "ip-10-12-68-170.b2c.test.com",
               "sin" : "sin.80",
               "env.description" : "Content Author Preview"
            }
         }
      },
    "ip-10-12-108.27.b2c.test.com" : {
       "environment" : {
          "esbqav" : {
             "ip" : "ip-10-12-108.27",
             "name" : "espv",
             "env.root" : "/",
             "host" : "ip-10-12-108.27.b2c.test.com",
             "sin" : "sin.0",
             "env.description" : "QA"
          }
       }
    }
     }
}
"""

json_data = json.loads(json_string)

for host in json_data.values():
    for hostname in host.values():
        environment = hostname.get('environment')

        for env in environment.values():
            name = env.get('name')
            print name

You can iterate over a dict by calling its .items() member. That way, you don't need to know beforehand what the keys are.

json= {
   "host" : {
      "ip-10-12-68-170.b2c.test.com" : {
         "environment" : {
            "testing1" : {
               "ip" : "ip-10-12-68-170",
               "name" : "testing",
               "env.root" : "/",
               "host" : "ip-10-12-68-170.b2c.test.com",
               "sin" : "sin.80",
               "env.description" : "Content Author Preview"
            }
         }
      },
      "ip-10-12-108.27.b2c.test.com" : {
         "environment" : {
            "esbqav" : {
               "ip" : "ip-10-12-108.27",
               "name" : "espv",
               "env.root" : "/",
               "host" : "ip-10-12-108.27.b2c.test.com",
               "sin" : "sin.0",
               "env.description" : "QA"
            }
         }
      }
   }
}
for ip, ip_dict in json['host'].items():
    for hostname, hostname_dict in ip_dict['environment'].items():
        name = hostname_dict['name']
        print (ip, hostname, name)

The following code is equivalent, but iterates over just the keys and not the key,value pairs:

for ip in json['host']:
    for hostname in json['host'][ip]['environment']:
        name = json['host'][ip]['environment'][hostname]['name']
        print (ip, hostname, name)