Web Reference: Dec 20, 2025 · This method removes duplicates by converting list elements into dictionary keys using fromkeys (). Since keys must be unique, repeated values are discarded while the original order is maintained. In Python 3.5 and below (including Python 2.7), use the OrderedDict. My timings show that this is now both the fastest and shortest of the various approaches for Python 3.5 (when it gained a C implementation; prior to 3.5 it's still the clearest solution, though not the fastest). Mar 4, 2025 · In this tutorial, I explained how to remove duplicates from a list in Python. I discussed four methods, such as converting a list to a set, using a for loop, using a list comprehension and using the Collection module.
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