How to Rename Dictionary Keys Without Reassignment or Iteration?

Renaming Dictionary Keys

Q: Is it possible to rename a dictionary key without reassignment or iteration?

A: For a Regular Dictionary:

Use this syntax to rename a key without affecting its value or order:

mydict[k_new] = mydict.pop(k_old)

For an Ordered Dictionary (Python 3.7 ):

To preserve ordering, recreate the dictionary with the updated key name:

{"two" if k == 2 else k:v for k,v in d.items()}

Note: Modifying the key itself is impractical as dictionary keys are usually immutable and havehable.

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