遍历数据框的json python 2

Question

I am new to python 2 and I want to loop through a json generated by a query and return same strings: This is my json:

"{\\"Machine\\":{\\"0\\":\\"Mach1\\",\\"1\\":\\"Mach2\\",\\"2\\":\\"Mach3\\",\\"3\\":\\"Mach4\\",\\"4\\":\\"Mach5\\"}}"

What I don't understand is wich is the key here and how can I loop to get a result like this:

Mach1
Mach2
Mach3
..

Or even just Mach1. I've tried this:

def printDict(dict):
    for key,v, value in d.iteritems():
        if type(v) is dict:
            printDict(v)
        else:
            print "{0} : {1}".

But doesn't seem to work

Answer 1

First mistake:

def printDict(dict):
    ...
    if type(v) is dict:

dict is no longer the built-in dictionary type, you've overwritten it locally. Also type(v) is dict is not a good way to check if something is an instance of something else (it doesn't take inheritance into account).

Second mistake:

for key,v, value in d.iteritems():

.iteritems() method returns a sequence of pairs, not triples. Also d is an undefined local variable.

Finally

print "{0} : {1}".

is a syntax error.

Is this what you are looking for:

def print_dict(dct):
    for key, value in dct.iteritems():
        if isinstance(value, dict):
            print_dict(value)
        else:
            print '{0} : {1}'.format(key, value)

Also if you start from raw JSON (ie a string) then you have to deserialize it first:

import json
dct = json.loads(my_json)