python:dict

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--- python:dict [2024/01/19 00:20] – 제거됨 - 바깥 편집 (Unknown date) 127.0.0.1
+++ python:dict [2024/03/23 02:42] (현재) – 바깥 편집 127.0.0.1
@@ 줄 1: / 줄 1: @@
+====== Python: Dict ======
+  * nested dict to flatten dict
+<code python>
+import pandas as pd
+d = {'a': 1,
+     'c': {'a': 2, 'b': {'x': 5, 'y' : 10}},
+     'd': [1, 2, 3]}
+df = pd.json_normalize(d, sep='.')
+print(df.to_dict(orient='records')[0])
+# https://stackoverflow.com/questions/6027558/flatten-nested-dictionaries-compressing-keys
+</code>
+  * nested dict to object
+<code python>
+from types import SimpleNamespace
+import json
+class Config(SimpleNamespace):
+    def __init__(self, config_dict):
+        super().__init__(**config_dict)
+def dict2obj(d):
+    return json.loads(json.dumps(d), object_hook=Config)
+config_dict = {'a': 1, 'b': {'c': 2}, 'd': ['hi', {'foo': 'bar'}]}
+config = dict2obj(config_dict)
+print(config.a)
+# https://stackoverflow.com/questions/1305532/convert-nested-python-dict-to-object
+</code>
+  * nested dict to namedtuple
+<code python>
+from collections import namedtuple
+def make_config(cfg):
+    if isinstance(cfg, dict):
+        return make_config_dict(cfg)
+    elif isinstance(cfg, list):
+        return make_config_list(cfg)
+    else:
+        raise NotImplementedError()
+def make_config_dict(cfg):
+    Config = namedtuple('Config', cfg.keys())
+    values = list()
+    for value in cfg.values():
+        if isinstance(value, dict):
+            value = make_config_dict(value)
+        elif isinstance(value, list):
+            value = make_config_list(value)
+        values.append(value)
+    return Config(*values)
+def make_config_list(cfg):
+    values = list()
+    for value in cfg:
+        if isinstance(value, dict):
+            value = make_config_dict(value)
+        elif isinstance(value, list):
+            value = make_config_list(value)
+        values.append(value)
+    return values
+config_dict = {'a': 1, 'b': {'c': 2}, 'd': ['hi', {'foo': 'bar'}]}
+config = make_config(config_dict)
+print(config)
+</code>
+{{tag>python dict}}