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- Language: en
- Documentation version: 1.1.x
Subclassing Flask¶
The Flask class is designed for subclassing.
For example, you may want to override how request parameters are handled to preserve their order:
from flask import Flask, Request
from werkzeug.datastructures import ImmutableOrderedMultiDict
class MyRequest(Request):
"""Request subclass to override request parameter storage"""
parameter_storage_class = ImmutableOrderedMultiDict
class MyFlask(Flask):
"""Flask subclass using the custom request class"""
request_class = MyRequest
This is the recommended approach for overriding or augmenting Flask’s internal functionality.