I'm using Python's JSON decoding library with Google Maps API. I am trying to obtain the zip code of an address but it sometimes resides in different dictionary key. Here are two examples (I've trimmed the JSON to what is relevant):
placemark1 = {
"AddressDetails": {
"Country": {
"AdministrativeArea": {
"SubAdministrativeArea": {
"Locality": {
"PostalCode": {
"PostalCodeNumber": "94043"
}
}
}
}
}
}
}
( View full JSON )
placemark2 = {
"AddressDetails": {
"Country" : {
"AdministrativeArea" : {
"Locality" : {
"PostalCode" : {
"PostalCodeNumber" : "11201"
}
}
}
}
}
}
( View full JSON )
So the zipcodes:
zipcode1 = placemark1['AddressDetails']['Country']['AdministrativeArea']['SubAdministrativeArea']['Locality']['PostalCode']['PostalCodeNumber']
zipcode2 = placemark2['AddressDetails']['Country']['AdministrativeArea']['Locality']['PostalCode']['PostalCodeNumber']
Now I was thinking perhaps I should just search the multi-dimensional dictionary for "PostalCodeNumber"
key. Does anyone have any idea on how to accomplish this? I want it to look something like this:
>>> just_being_a_dict = {}
>>> just_a_list = []
>>> counter_dict = {'Name': 'I like messing things up'}
>>> get_key('PostalCodeNumber', placemark1)
"94043"
>>> get_key('PostalCodeNumber', placemark2)
"11201"
>>> for x in (just_being_a_dict, just_a_list, counter_dict):
... get_key('PostalCodeNumber', x) is None
True
True
True
def get_key(key,dct):
if key in dct:
return dct[key]
for k in dct:
try:
return get_key(key,dct[k])
except (TypeError,ValueError):
pass
else:
raise ValueError
placemark1 = {
"AddressDetails": {
"Country": {
"AdministrativeArea": {
"SubAdministrativeArea": {
"Locality": {
"PostalCode": {
"PostalCodeNumber": "94043"
}
}
}
}
}
}
}
placemark2 = {
"AddressDetails": {
"Country" : {
"AdministrativeArea" : {
"Locality" : {
"PostalCode" : {
"PostalCodeNumber" : "11201"
}
}
}
}
}
}
just_being_a_dict = {}
just_a_list = []
counter_dict = {'Name': 'I like messing things up'}
for x in (placemark1, placemark2, just_being_a_dict, just_a_list, counter_dict):
try:
print(get_key('PostalCodeNumber', x))
except ValueError:
print(None)
yields
94043
11201
None
None
None
from collections import Mapping
zipcode1 = {'placemark1':{'AddressDetails':{'Country':{'AdministrativeArea':{'SubAdministrativeArea':{'Locality':{'PostalCode':{'PostalCodeNumber':"94043"}}}}}}}}
zipcode2 = {'placemark2':{'AddressDetails':{'Country':{'AdministrativeArea':{'Locality':{'PostalCode':{'PostalCodeNumber':'11201'}}}}}}}
def treeGet(d, name):
if isinstance(d, Mapping):
if name in d:
yield d[name]
for it in d.values():
for found in treeGet(it, name):
yield found
yields all matching values in tree:
>>> list(treeGet(zipcode1, 'PostalCodeNumber'))
['94043']
>>> list(treeGet(zipcode2, 'PostalCodeNumber'))
['11201']
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