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Improve traverse_obj

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pukkandan 2021-07-11 03:44:39 +05:30
parent 7dde84f3c9
commit 325ebc1703
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1 changed files with 34 additions and 22 deletions
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56
yt_dlp/utils.py
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@ -6224,37 +6224,49 @@ def load_plugins(name, suffix, namespace):
return classes
def traverse_obj(obj, keys, *, casesense=True, is_user_input=False, traverse_string=False):
def traverse_obj(
obj, *key_list, default=None, expected_type=None,
casesense=True, is_user_input=False, traverse_string=False):
''' Traverse nested list/dict/tuple
@param default Default value to return
@param expected_type Only accept final value of this type
@param casesense Whether to consider dictionary keys as case sensitive
@param is_user_input Whether the keys are generated from user input. If True,
strings are converted to int/slice if necessary
@param traverse_string Whether to traverse inside strings. If True, any
non-compatible object will also be converted into a string
'''
keys = list(keys)[::-1]
while keys:
key = keys.pop()
if isinstance(obj, dict):
assert isinstance(key, compat_str)
if not casesense:
obj = {k.lower(): v for k, v in obj.items()}
key = key.lower()
obj = obj.get(key)
else:
if is_user_input:
key = (int_or_none(key) if ':' not in key
else slice(*map(int_or_none, key.split(':'))))
if key is None:
if not casesense:
_lower = lambda k: k.lower() if isinstance(k, str) else k
key_list = ((_lower(k) for k in keys) for keys in key_list)
def _traverse_obj(obj, keys):
for key in list(keys):
if isinstance(obj, dict):
obj = (obj.get(key) if casesense or (key in obj)
else next((v for k, v in obj.items() if _lower(k) == key), None))
else:
if is_user_input:
key = (int_or_none(key) if ':' not in key
else slice(*map(int_or_none, key.split(':'))))
if not isinstance(key, (int, slice)):
return None
if not isinstance(obj, (list, tuple)):
if traverse_string:
obj = compat_str(obj)
else:
if not isinstance(obj, (list, tuple)):
if not traverse_string:
return None
obj = str(obj)
try:
obj = obj[key]
except IndexError:
return None
assert isinstance(key, (int, slice))
obj = try_get(obj, lambda x: x[key])
return obj
return obj
for keys in key_list:
val = _traverse_obj(obj, keys)
if val is not None:
if expected_type is None or isinstance(val, expected_type):
return val
return default
def traverse_dict(dictn, keys, casesense=True):