方法后 throws_带有示例的python设置throws（）方法

以你之姓@ 2023-03-05 12:54 10阅读 0赞

方法 后 throws

## 设置throw()方法 **(**Set discard() Method**)** ##

**discard() method** is used to remove a given element from the set, it accepts an element and removes it from the set.

**reject()方法**用于从集合中移除给定元素，它接受一个元素并将其从集合中移除。

**Note**: If the given element does not exist in the set, the “discard() method” does not return any error.

**注意** ：如果给定元素在集合中不存在，则“ discard()方法”不会返回任何错误。

**Syntax:**

**句法：**

set_name.discard(element)

**Parameter(s):**

**参数：**

*  element – It represents the element/value to be removed from the list.
    
    element –它表示要从列表中删除的元素/值。

**Return value:**

**返回值：**

The return type of this method is <class 'NoneType'>, it returns nothing.

此方法的返回类型为<class'NoneType'> ，它什么也不返回。

**Example 1:**

**范例1：**

# Python Set discard() Method with Example
    
    # declaring the sets
    cars_1 = {
        "Porsche", "Audi", "Lexus"}
    cars_2 = {
        "Porsche", "Mazda", "Lincoln"}
    
    # printing the sets before discard() call
    print("cars_1:", cars_1)
    print("cars_2:", cars_2)
    
    # removing an element from cars_1
    cars_1.discard("Porsche")
    # removing an element from cars_2
    cars_2.discard("Lincoln")
    
    # printing the sets after dLincoln() call
    print("cars_1:", cars_1)
    print("cars_2:", cars_2)

**Output**

**输出量**

cars_1: {'Audi', 'Lexus', 'Porsche'}
    cars_2: {'Mazda', 'Porsche', 'Lincoln'}
    cars_1: {'Audi', 'Lexus'}
    cars_2: {'Mazda', 'Porsche'}

**Example 2:**

**范例2：**

# Python Set discard() Method with Example
    
    # declaring a set
    cities = {
        "New Delhi", "Banglore", "Indore", "Gwalior"}
    
    # printing set before discard() call
    print("cities:", cities)
    
    # removing "New Delhi" from the set
    cities.discard("New Delhi")
    
    # removing an element that does not exist
    # in the set, thus we will remove "Mumbai"
    # method discard() will not give any error
    cities.discard("Mumbai")
    
    # printing set after discard() call
    print("cities:", cities)

**Output**

**输出量**

cities: {'New Delhi', 'Gwalior', 'Indore', 'Banglore'}
    cities: {'Gwalior', 'Indore', 'Banglore'}

> 翻译自: [https://www.includehelp.com/python/set-discard-method-with-example.aspx][https_www.includehelp.com_python_set-discard-method-with-example.aspx]

方法 后 throws

[https_www.includehelp.com_python_set-discard-method-with-example.aspx]: https://www.includehelp.com/python/set-discard-method-with-example.aspx