遍历json列表并使用Python获取特定的键和值

Question

I have a JSON list like this (it was a JSON response, the below is after i did json.loads )

[{'status': 'ok', 'slot': None, 'name': 'blah', 'index': 0, 'identify': 'off', 
'details': None, 'speed': None, 'temperature': None}, {'status': 'ok', 'slot': 
None, 'name': 'blah0', 'index': 0, 'identify': 'off', 'details': None, 
'speed': None, 'temperature': None}, {'status': 'ok', 'slot': None, 'name': 
'blah1', 'index': 1, 'identify': 'off', 'details': None, 'speed': None, 
'temperature': None}, {'status': 'ok', 'slot': None, 'name': 'blah2', 
'index': 2, 'identify': 'off', 'details': None, 'speed': None, 'temperature': 
None}, {'status': 'ok', 'slot': None, 'name': 'blah3', 'index': 3,
'identify': 'off', 'details': None, 'speed': None, 'temperature': None}]

I want to get both name and the status of the list, if name='blah' or 'blah0' or 'blah1' or 'blah2' or 'blah3' Essentially, for all the matches i want to store all the name and status in separate variables to use it elsewhere. (can be dynamically creating variables or statically assigning them will also work for me)

I tried this, but doesn't seems to work the way i want.

for value in data:
   if value['name'] in ['blah', 'blah0', 'blah1', 'blah2', 'blah3']:
        print(value['name'], value['status'])

This prints out the name and status as a string one line below the other. But i want each name and status to be assigned to a variable so i can use it later. Any help is much appreciated!

Answer 1

You don't really want dynamic variables, but you can use a list comprehension. You should also take advantage of constant-cost set membership test:

keep = set(['blah', 'blah0', 'blah1', 'blah2', 'blah3'])
result = [(value['name'], value['status']) for value in data if value['name'] in keep]
print(result)

Output:

[('blah', 'ok'),
 ('blah0', 'ok'),
 ('blah1', 'ok'),
 ('blah2', 'ok'),
 ('blah3', 'ok')]

If you want a dictionary:

keep = set(['blah', 'blah0', 'blah1', 'blah2', 'blah3'])
result = {value['name']: value['status'] for value in data if value['name'] in keep}
print(result)

Answer 2

EDITED Try something like:

new_data = []
# Extract all the data and map them by name and status
for value in data:
    name = value.get("name")
    status = value.get("status")
    if name in ['blah', 'blah0', 'blah1', 'blah2', 'blah3']:
         new_data.append(dict(
            name=name,
            status=status))

Option 1

# loop through the new data
for data in new_data:
    print(data)

# OUTPUT:
{'name': 'blah', 'status': 'ok'}
{'name': 'blah0', 'status': 'ok'}
{'name': 'blah1', 'status': 'ok'}
{'name': 'blah2', 'status': 'ok'}
{'name': 'blah3', 'status': 'ok'}

Option 2

for data in new_data:
    for key, value in data.items():
        print(key, value)
#OUTPUT:
name blah
status ok
name blah0
status ok
name blah1
status ok
name blah2
status ok
name blah3
status ok

Option 3

for data in new_data:
        print(data['name'], data['status'])
#OUTPUT
blah ok
blah0 ok
blah1 ok
blah2 ok
blah3 ok