Python 从集合中移除项目

在本文中，我们将学习如何从集合中移除项目。我们将看到不同的方法，可以轻松地从集合中移除项目。

假设我们有以下输入 –

myset = {"bmw", "tesla", "toyota", "ford", "mercedes"}

删除一项后，输出应如下所示：

{'tesla', 'ford', 'bmw', 'mercedes'}

使用remove()方法从集合中移除项目

使用remove()方法，如果尝试移除Set中不存在的项目，则会抛出错误。

示例

# Creating a Set
myset = {"bmw", "tesla", "toyota", "ford", "mercedes"}
print("Set = \n",myset)

# Applying the remove() method to remove an element
myset.remove("toyota")

# Display the updated Set
print("\nSet (after removing an element) =\n",myset)

输出

Set = 
 {'mercedes', 'bmw', 'toyota', 'tesla', 'ford'}

Set (after removing an element) =
 {'mercedes', 'bmw', 'tesla', 'ford'}

使用discard()方法从集合中移除元素

使用discard()方法，试图移除Set中不存在的元素时不会抛出错误。

示例

# Creating a Set
myset = {"javascript", "php", "jquery", "angular", "react"}
print("Set = \n",myset)

# Applying the remove() method to remove an element
myset.discard("php")

# Display the updated Set
print("\nSet (after removing an element) =\n",myset)

输出

Set = 
 {'javascript', 'react', 'angular', 'php', 'jquery'}

Set (after removing an element) =
 {'javascript', 'react', 'angular', 'jquery'}

使用pop()方法从集合中删除项目

示例

# Creating a Set
myset = {"bmw", "tesla", "toyota", "ford", "mercedes"}
print("Set = \n",myset)

# Applying the pop() method to remove an element
res = myset.pop()

# Displaying the removed item
print("\nRemoved item from the Set =\n",res)

# Display the updated Set
print("\nSet (after removing an element) =\n",myset)

输出

Set = 
 {'javascript', 'react', 'angular', 'php', 'jquery'}

Set (after removing an element) =
 {'javascript', 'react', 'angular', 'jquery'}