Read json file using python - json

Question

Team, i have my code working with dict in comments below. Now, i want to move that to file.json and read from there keeping the logic same. any hints how can i represent my comment section below in json and read it backin dictionary?
convert python dictionary to json file and read in python
'''
source_cidr_name = {
'location1' : ("1.1.1.1/32", [22, 443]),
'location2' : ("2.2.2.2/32", [443])}
'''
source_cidr_name = {}
with open('/Users/code/dev/whitelist.json') as jf:
source_cidr_name = json.load(jf)
file.json looks below but i don't know how to represent my ports 22 and 443
{
"source_cidr_whitelist": {"key1": {"ip_subnet": "1.1.1.1/32"}, "key2": {"ip_subnet": "2.2.2.2/32"]}}}

Answer 1

JSON i.e. JavaScript Object Notaion does not support including single quotes ' around strings and ( or ) arounf lists/arrays while using json.loads() to convert string representation to object (dictionary).
Using json.dumps() is okay with tuples/list, single/double quotes etc. as Python internally converts them in proper valid JSON. Mean to say it converts ( ) used to represent/surround tuples to [ ] and ' used to represent/surround strings to ".
My suggestion to get rid of this kind of problems
While dumping/writing data to JSON file use json.dumps() to create string from an existing Python objects like list/dictionary (JSON convertible).
After that if you will read the same at any point of time later, it would be easily converted to the real Python object list/dictionary etc. using json.loads() from strings or using json.load() from file like objects.
An example which helped to figure out
>>> import json
>>>
>>> d = {
... 'location1' : ("1.1.1.1/32", [22, 443]),
... 'location2' : ("2.2.2.2/32", [443])}
>>>
>>> s = json.dumps(d, indent=4)
>>> print(s)
{
"location2": [
"2.2.2.2/32",
[
443
]
],
"location1": [
"1.1.1.1/32",
[
22,
443
]
]
}
>>>
>>> new_d = json.loads(s)
>>>
>>> new_d
{u'location2': [u'2.2.2.2/32', [443]], u'location1': [u'1.1.1.1/32', [22, 443]]}
>>>
>>> new_d['location2']
[u'2.2.2.2/32', [443]]
>>>
>>> new_d['location1']
[u'1.1.1.1/32', [22, 443]]
>>>
>>> new_d['location1'][0]
u'1.1.1.1/32'
>>> new_d['location1'][1]
[22, 443]
>>>
>>> new_d['location1'][1][0]
22
>>> new_d['location1'][1][1]
443
>>>
>>> # NEW (start from string)
...
>>> s = '''{
... 'location1' : ("1.1.1.1/32", [22, 443]),
... 'location2' : ("2.2.2.2/32", [443])}'''
>>> print(s)
{
'location1' : ("1.1.1.1/32", [22, 443]),
'location2' : ("2.2.2.2/32", [443])}
>>>
1st try
>>> s = '''{'location1' : ["1.1.1.1/32", [22, 443]],'location2' : ["2.2.2.2/32", [443]]}'''
>>> s
'{\'location1\' : ["1.1.1.1/32", [22, 443]],\'location2\' : ["2.2.2.2/32", [443]]}'
>>>
>>> print(s)
{'location1' : ["1.1.1.1/32", [22, 443]],'location2' : ["2.2.2.2/32", [443]]}
>>>
>>> d = json.loads(s)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 339, in loads
return _default_decoder.decode(s)
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 364, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 380, in raw_decode
obj, end = self.scan_once(s, idx)
ValueError: Expecting property name: line 1 column 2 (char 1)
>>>
2nd try
>>>
>>> s = '''{
... "location1" : ("1.1.1.1/32", [22, 443]),
... "location2" : ("2.2.2.2/32", [443])}'''
>>>
>>> d = json.loads(s)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 339, in loads
return _default_decoder.decode(s)
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 364, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/local/Cellar/python#2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 382, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded
>>>
>>>
Finally
>>> s = '''{
... "location1" : ["1.1.1.1/32", [22, 443]],
... "location2" : ["2.2.2.2/32", [443]]}'''
>>>
>>> d = json.loads(s)
>>> d
{u'location2': [u'2.2.2.2/32', [443]], u'location1': [u'1.1.1.1/32', [22, 443]]}
>>>
>>> type(d)
<type 'dict'>
>>>
>>> d['location2']
[u'2.2.2.2/32', [443]]
>>>
>>> d['location2'][1][0]
443
>>>