@validate_input @sanitize_output def process_form(data):

Decorators & Metaclasses

Meaning

A Python function that processes form data with input validation and output sanitization decorators.

Primary Function

Processes form data after validating input and sanitizing output.

Communicative Purpose

Illustrates the use of decorators for input validation and output sanitization in Python web applications.

Pattern

@validate_input @sanitize_output def process_form(data):

Core Structure

@decorator @decorator def function_name(param):

Função primária

Processes form data after validating input and sanitizing output.

Propósito comunicativo

Illustrates the use of decorators for input validation and output sanitization in Python web applications.

Situações de gatilho

When handling user-submitted form data in a web application where input must be validated and output sanitized to prevent injection attacks.

Contextos

Web development, form handling, security best practices, Python decorator usage.

Padrão

@validate_input @sanitize_output def process_form(data):

Estrutura central

@decorator @decorator def function_name(param):

Slots de substituição

validate_input, sanitize_output, function_name, parameter

Colocados típicos

Flask
Django
FastAPI
form
validation
sanitization

Substituições comuns

validate_input -> validate
sanitize_output -> sanitize
process_form -> handle_form
data -> form_data

Erros comuns

Omitting one decorator, reversing decorator order, forgetting to return processed data

Similar / contraste

Similar: @login_required, @permission_required. Contrasting: plain function without decorators

Interferências

Confusing with Java annotations or C# attributes which use different syntax

Família do chunk

input validation
output sanitization
decorator pattern
form handling
web security

Nuance

Decorator order matters: outer decorator applies first to the function result

Efeito pragmático

Signals that input is validated and output is sanitized, indicating security-conscious code

Dica de memória

Validate input, sanitize output

Upgrade path

Using validation libraries like Pydantic or Marshmallow for schema-based validation and serialization

Tipo de construção: decorator_patternTag de espaçamento: Medium-termIdioma?: Sim

Examples

@validate_input @sanitize_output def login_form(data): username = data.get('username') password = data.get('password') # process login return {'status': 'ok'}

@validate_input @sanitize_output def register_user(data): email = data.get('email') password = data.get('password') # create user return {'user_id': 123}

@validate_input @sanitize_output def process_json(payload): title = payload.get('title') content = payload.get('content') # store article return {'id': 456}