Clash Royale CLAN TAG#URR8PPP

How do I configure multiple dictionary keys in a yaml file in Python?

I am trying to use a yaml file to store dictionary keys so I can parse various json payloads.

I have the following yaml file loaded into a variable called 'cfg':

my_table: metadata


When I run:

for i in json['resources']:
print(i[cfg['my_table']])


I can see all values from my json's ['metadata'] keys just fine.

However, I would like to see all values from the ['metadata']['guid'] keys that exist under ['resources']. So when I change my yaml file to:

my_table: metadata, guid


It doesn't work. I've also tried these variations:

my_table: ['metadata', 'guid'] #tried ''.join("['0']".format(a) for a in cfg['my_table']) which gives me what I want, but when I shove this inside i, I get a key error
my_table: ['metadata']['guid'] #yaml file doesn't parse properly


Any ideas?

my_table: [metadata, guid]

guid

metadata

resources

i['metadata']['guid']

i

i['metadata']

x

i[x] is i['metadata']['guid']

1 Answer
1

So you want to store dictionary keys in a yaml file?

Just do

# keys.yaml
my_table: [metadata, guid]


And then in your python file

keys = yaml.safe_load('keys.yaml')['my_table']

for obj in json['resources']: # don't call it json, that's a package name
print(obj[keys[0]][keys[1]])


For a variable number of keys (not only two) do it like so:

def recursive_getitem(obj, keys):
if len(keys) == 0:
return obj
return recursive_getitem(obj[keys[0]], keys[1:])


and then do

for obj in json['resources']:
print(recursive_getitem(obj, keys))


To answer your second question in the comments, you need to use a nested list

# keys.yaml
my_table:
- [metadata, guid]
- [entity, name]


.

# py file
keys = yaml.safe_load('keys.yaml')['my_table']

for obj in json['resources']: # don't call it json, that's a package name
print(obj[keys[0][0]][keys[0][1]])
print(obj[keys[1][0]][keys[1][1]])


yaml.load()

yaml.safe_load()

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