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import json
try:
from collections.abc import Mapping
except ImportError:
from collections import Mapping
def to_key(value):
return json.dumps(value)
def insert(value, index, values):
key = to_key(value)
if key not in index:
index[key] = len(values)
values.append(value)
return len(values) - 1
return index.get(key)
def flatten(data, index, values):
if isinstance(data, (list, tuple)):
flattened = [flatten(child, index, values) for child in data]
elif isinstance(data, Mapping):
flattened = {key: flatten(child, index, values) for key, child in data.items()}
else:
flattened = data
return insert(flattened, index, values)
def crunch(data):
index = {}
values = []
flatten(data, index, values)
return values
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