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def extract_values(obj, key):
"""Recursively pull values of specified key from nested JSON."""
arr = []
def extract(obj, arr, key):
"""Return all matching values in an object."""
if isinstance(obj, dict):
for k, v in obj.items():
if isinstance(v, (dict, list)):
extract(v, arr, key)
elif k == key:
arr.append(v)
elif isinstance(obj, list):
for item in obj:
extract(item, arr, key)
return arr
results = extract(obj, arr, key)
return results
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