列表是一个重要的容器,几乎在日常编程和Web开发的每个代码中都使用列表,使用的次数更多,掌握它的需求也更多,因此必须了解其操作。从列表操作中删除重复项具有大量的应用程序,因此,其知识很好。
# using naive methods # initializing list test_list = [1, 3, 5, 6, 3, 5, 6, 1] print ("The original list is : " + str(test_list)) # using naive method to remove duplicated from list res = [] for i in test_list: if i not in res: res.append(i) # printing list after removal print ("The list after removing duplicates : " + str(res)) # using list comprehension # initializing list test_list = [1, 3, 5, 6, 3, 5, 6, 1] print ("The original list is : " + str(test_list)) # using list comprehension to remove duplicated from list res = [] [res.append(x) for x in test_list if x not in res] # printing list after removal print ("The list after removing duplicates : " + str(res)) # using set()# initializing list test_list = [1, 5, 3, 6, 3, 5, 6, 1] print ("The original list is : " + str(test_list)) # using set() to remove duplicated from list test_list = list(set(test_list)) # printing list after removal print ("The list after removing duplicates : " + str(test_list)) # using list comprehension + enumerate()# initializing list test_list = [1, 5, 3, 6, 3, 5, 6, 1] print ("The original list is : " + str(test_list)) # using list comprehension + enumerate() to remove duplicated from list res = [i for n, i in enumerate(test_list) if i not in test_list[:n]] # printing list after removal print ("The list after removing duplicates : " + str(res)) # using collections.OrderedDict.fromkeys() from collections import OrderedDict # initializing list test_list = [1, 5, 3, 6, 3, 5, 6, 1] print ("The original list is : " + str(test_list)) # using collections.OrderedDict.fromkeys() to remove duplicated from list res = list(OrderedDict.fromkeys(test_list)) # printing list after removal print ("The list after removing duplicates : " + str(res))
输出结果
The original list is : [1, 3, 5, 6, 3, 5, 6, 1] The list after removing duplicates : [1, 3, 5, 6] The original list is : [1, 3, 5, 6, 3, 5, 6, 1] The list after removing duplicates : [1, 3, 5, 6] The original list is : [1, 5, 3, 6, 3, 5, 6, 1] The list after removing duplicates : [1, 3, 5, 6] The original list is : [1, 5, 3, 6, 3, 5, 6, 1] The list after removing duplicates : [1, 5, 3, 6] The original list is : [1, 5, 3, 6, 3, 5, 6, 1] The list after removing duplicates : [1, 5, 3, 6]