python 示例_带有示例的Python字典update（）方法

python 示例

字典update()方法 (Dictionary update() Method)

update() method is used to update the dictionary by inserting new items to the dictionary.

update()方法用于通过将新项目插入字典来更新字典。

Syntax:

句法：

    dictionary_name.setdefault(iterable)

Parameter(s):

参数：

iterable – It represents an iterbale object or a dictionary to be inserted in the dictionary.
可迭代 –表示要在字典中插入的iterbale对象或字典。

Return value:

返回值：

It returning nothing.

它什么也没返回。

Example:

例：

# Python Dictionary update() Method with Example
# dictionary declaration
student = {
"roll_no": 101,
"name": "Shivang",
"course": "B.Tech",
"perc" : 98.5
}
# printing dictionary
print("data of student dictionary...")
print(student)
# inserting an item
student.update({'city' : 'Indore'})
# printing dictionary after update()
print("data of student dictionary after update()...")
print(student)
# inserting multiple items
student.update({'city' : 'Indore', 'address' : 'Tech park'})
# printing dictionary after update()
print("data of student dictionary after update()...")
print(student)

Output

输出量

data of student dictionary...
{'roll_no': 101, 'name': 'Shivang', 'course': 'B.Tech', 'perc': 98.5}
data of student dictionary after update()...
{'roll_no': 101, 'name': 'Shivang', 'course': 'B.Tech', 'perc': 98.5, 'city': 'Indore'}
data of student dictionary after update()...
{'roll_no': 101, 'name': 'Shivang', 'course': 'B.Tech', 'perc': 98.5, 'city': 'Indore', 'address': 'Tech park'}