如何从 Python 中的列表中移除重复项?


要从 Python 中的一个列表中移除重复项,我们可以使用本文所讨论的多种方法。

使用字典从一个列表中移除重复项

示例

在该示例中,我们将使用 OrderedDict 从列表中移除重复项 -

from collections import OrderedDict # Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using dictionary resList = OrderedDict.fromkeys(mylist) # Display the List after removing duplicates print("Updated List = ",list(resList))

输出

List =  ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony']
Updated List =  ['Jacob', 'Harry', 'Mark', 'Anthony']

使用列表推导从一个列表中移除重复项

示例

在该示例中,我们将使用列表推导从列表中移除重复项 

# Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using List Comprehension resList = [] [resList.append(n) for n in mylist if n not in resList] print("Updated List = ",resList)

输出

List =  ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony']
Updated List =  ['Jacob', 'Harry', 'Mark', 'Anthony']

使用集合从一个列表中移除重复项

示例

在该示例中,我们将使用 set() 方法从列表中移除重复项 -

# Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using Set resList = set(mylist) print("Updated List = ",list(resList))

输出

List =  ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony']
Updated List =  ['Anthony', 'Mark', 'Jacob', 'Harry']

上次更新时间: 2022-09-16

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