算法 - 如何有效地删除列表中的重复元素？

def remove_duplicates(lst):
    return list(set(lst))

def remove_duplicates(lst):
    return lst[:unique_elements(lst)]

def remove_duplicates(lst):
    result = []
    for i in range(len(lst)):
        for j in range(i + 1, len(lst)):
            if lst[i] == lst[j]:
                result.append(lst[i])
                break
    return result

def remove_duplicates(lst):
    return list(set(lst))

from collections import OrderedDict

def remove_duplicates(lst):
    return list(OrderedDict.fromkeys(lst))

import numpy as np

def remove_duplicates(lst):
    return np.unique(lst)