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tlv: Function for flattening the list-of-dict output of TLV decoder

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Change-Id: Ia5ad8f1d3b0d47ebdb1856b0feaba120bad3eef9
This commit is contained in:
Harald Welte
2022-02-11 15:44:28 +01:00
parent 425038ffbc
commit 9a2a6691b0
1 changed files with 27 additions and 0 deletions
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27
pySim/tlv.py
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@@ -404,3 +404,30 @@ class TLV_IE_Collection(metaclass=TlvCollectionMeta):
def to_tlv(self): def to_tlv(self):
return self.to_bytes() return self.to_bytes()
def flatten_dict_lists(inp):
"""hierarchically flatten each list-of-dicts into a single dict. This is useful to
make the output of hierarchical TLV decoder structures flatter and more easy to read."""
def are_all_elements_dict(l):
for e in l:
if not isinstance(e, dict):
return False
return True
if isinstance(inp, list):
if are_all_elements_dict(inp):
# flatten into one shared dict
newdict = {}
for e in inp:
key = list(e.keys())[0]
newdict[key] = e[key]
inp = newdict
# process result as any native dict
return {k:flatten_dict_lists(inp[k]) for k in inp.keys()}
else:
return [flatten_dict_lists(x) for x in inp]
elif isinstance(inp, dict):
return {k:flatten_dict_lists(inp[k]) for k in inp.keys()}
else:
return inp