Handling Nested Dictionaries
If you need to rename a key in a nested dictionary, you can use recursive functions.
Explanation
- Recursive Function: The
rename_key_nested
function iterates over the dictionary keys. If it encounters a nested dictionary, it calls itself recursively. - Check and Rename: If the key matches the old key, it renames it as before.
def rename_key_nested(dictionary, old_key, new_key):
for key in list(dictionary.keys()):
if isinstance(dictionary[key], dict):
rename_key_nested(dictionary[key], old_key, new_key)
if key == old_key:
dictionary[new_key] = dictionary.pop(old_key)
# Original nested dictionary
nested_dict = {
'level1': {
'old_key': 'value',
'level2': {
'old_key': 'value2'
}
}
}
# Rename 'old_key' to 'new_key' in nested dictionary
rename_key_nested(nested_dict, 'old_key', 'new_key')
print(nested_dict)
Output
{'level1': {'new_key': 'value', 'level2': {'new_key': 'value2'}}}
How to Change the name of a key in dictionary?
Dictionaries in Python are a versatile and powerful data structure, allowing you to store key-value pairs for efficient retrieval and manipulation. Sometimes, you might need to change the name of a key in a dictionary. While dictionaries do not directly support renaming keys, there are several ways to achieve this by creating a new key-value pair and deleting the old one. In this article, we will explore different methods to change the name of a key in a dictionary.
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