How to Extract Dictionary Keys as a List in Python 3?

Extracting Keys as a List in Python 3

While in Python 2.7, obtaining dictionary keys as a list was straightforward, Python 3 introduces a change that returns the dict_keys object instead. This alteration can be overcome using list comprehension:

list(newdict.keys())

This method converts the dict_keys object to a regular list.

However, it's important to consider whether using a dict_keys object poses any functional implications. Duck typing in Python allows for objects with similar semantics to be treated as interchangeable. dict_keys behaves like a list in many ways, allowing for iterations and other list-like operations:

for key in newdict.keys():
    print(key)

While dict_keys does not support insertion like dict[k] = v, such operations may not be necessary in many scenarios. By embracing duck typing, you can leverage the functionality of dict_keys without relying on explicit list conversions.

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