Python 如何从列表中删除重复项

为了从Python中的列表中删除重复项，我们可以使用本文中讨论的各种方法。

使用字典从列表中删除重复项

示例

在这个示例中，我们将使用OrderedDict从列表中删除重复项-

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']

使用列表解析从列表中去除重复项

示例

在这个示例中，我们将使用列表解析从列表中去除重复项。

# 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Set从列表中删除重复项

示例

在这个示例中，我们将使用set()方法从列表中删除重复项 –

# 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']