Skip to main content

Python - Marshmallow - Deserializing

Create a file named deserializing.py

from marshmallow import Schema, fields, INCLUDE, EXCLUDE # Install marshmallow latest pre-release version: $ pip install -U marshmallow --pre


class BookSchema(Schema): # Class of type Schema
title = fields.Str(required=True) # Schema property, required
author = fields.Str() # Schema property
description = fields.Str() # Schema property

class Book: # Class of type Regular

def __init__(self, title:str, author:str, description:str): # Object constructor
self.title = title # Class property
self.author = author # Class property
self.description = description # Class property

def display(self) -> dict: # function that returns a dictionary of all the properties in the object
return {"title": self.title, "author": self.author, "description": self.description} # dictionary of all the properties in the object


book_dict = {
"title": "Clean Code",
"author": "Bob Martin",
"description": "A book about writing cleaner code, with examples in Java",
} # input dictionary

book_schema = BookSchema(unknown=EXCLUDE) # Creating Object of BookSchema
book = book_schema.load(book_dict) # passing dictionary to the object of class BookSchema
book_obj = Book(**book) # Creating Object of Book

print(book) # print call load function of book_schema object
print(book_obj) # print book_obj object
print(book_obj.display()) # print call display function of book_obj object
print(book_obj.title) # print title property of book_obj object
print(book_obj.author) # print author property of book_obj object
print(book_obj.description) # print description property of book_obj object

Comments

Post a Comment

Popular posts from this blog

Difference between .exec() and .execPopulate() in Mongoose?

Here I answer what is the difference between .exec() and .execPopulate() in Mongoose? .exec() is used with a query while .execPopulate() is used with a document Syntax for .exec() is as follows: Model.query() . populate ( 'field' ) . exec () // returns promise . then ( function ( document ) { console . log ( document ); }); Syntax for .execPopulate() is as follows: fetchedDocument . populate ( 'field' ) . execPopulate () // returns promise . then ( function ( document ) { console . log ( document ); }); When working with individual document use .execPopulate(), for model query use .exec(). Both returns a promise. One can do without .exec() or .execPopulate() but then has to pass a callback in populate.
1 comment
Read more

Two Ways of rendering in React Examples

Two Ways of rendering in React Examples 1 - Render twice HTML < div id = "p1" ></ div > < div id = "p2" ></ div > CSS . person { display : inline - block ; margin : 10px ; border : 1px solid # eee ; box - shadow : 0 2px 2px # ccc ; } JAVASCRIPT (Babel) function Person ( props ) { return ( < div className = ' person "> < h1 >{ props . name }</ h1 > < p > Age :{ props . age }</ p > </ div > ); } ReactDOM . render (< Person name = "VK" age = "29" />, document . querySselector ( '#p1' )); ReactDOM . render (< Person name = "HK" age = "28" />, document . querySselector ( '#p2' )); 2 Render all at once HTML < div id = "app" ></ div > CSS . person { display : inline - block ; margin : 1...
Post a Comment
Read more

Resolve: Uncaught TypeError: firebase.database is not a function

If you are getting the error: Uncaught TypeError: firebase.database is not a function Resolve it by including firebase-database.js in your html page as follows: <!-- The core Firebase JS SDK is always required and must be listed first --> <script defer src = "https://www.gstatic.com/firebasejs/6.2.4/firebase-app.js" ></script> <script defer src = "https://www.gstatic.com/firebasejs/3.1.0/firebase-database.js" ></script> That is it. Let me know if this was helpful.
Post a Comment
Read more