Skip to main content

Utilities for wrapping and dispatching functions

Project description

Utilities for wrapping and dispatching functions.

Supported Python versions:

  • 2.7

  • 3.4

  • 3.5


pluggable will take some decorators and simply apply it. But applied decorators can be purged by purge_pluggable_decorators.

from functools import lru_cache
from wraptools.pluggable import pluggable

def get_data():
    """ Some function return data from RDB or so. """

purge_pluggable_decorators is useful on tests.

from wraptools.pluggable import purge_pluggable_decorators

    def test__get_data(self):
         always_flesh_data = get_data()

Or it can be also used as a context manager.

with purge_pluggable_decorators():
    always_flesh_data = get_data()

pluggable decorator can be useful for view functions of Web Frameworks, like Django.

def profile_view(request):
    return TemplateResponse(request, "profile.html")


dispatch will create function by some condition and functions. Following example means

  • When request is authenticated, dashboard function will be called.

  • Other cases, landing_page function will be called.

from wraptools.dispatch import dispatch
from wraptools.contrib.django.dispatchers import is_authenticated

def landing_page(request):
    return TemplateResponse(request, "landing.html")

def dashboard(request):
    return TemplateResponse(request, "dashboard.html")

top_view = dispatch(
    (is_authenticated, dashboard),

Combine conditions

In this case dispatch is used for Django’s view, but it can be used generic Python functions.

dispatcher functions can be combined and inverted.

  • To create and condition, just combine dispatchers by &

  • or condition, by |

  • not condition, by ~

from wraptools.contrib.django.dispatchers import is_authenticated, method_get

top = dispatch(
    (is_authenticated & method_get, dashboard_get),
    (is_authenticated & (method_post | method_put), dashboard_post),
    (~is_authenticated, landing),

Create own dispatcher

Basically dispatcher is just a function to get same arguments with dispatched functions and return bool values.

def is_even(num):
    return num % 2 == 0

def echo(num):
    return num

    (is_even, echo),

But by using dispatcher decorator, your dispatcher functions will be able to be combined and inverted by &, |, or ~

from wraptools.dispatch import dispatcher

def is_even(num):
    return num % 2 == 0

    (~is_even, ...),  # It will be called when the value is odd (not even).


context is a decorator which injects additional arguments to wrapped functions. Following example is to separate logic to get user object into get_user context function, and applying it for profile_page view by context decorator.

from wraptools.context import context

def get_user(user_id):
    return get_object_or_404(User, id=user_id)

def profile_page(request, user_id, user):
    return TemplateResponse(request, "profile.html")

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

wraptools-1.1.tar.gz (5.8 kB view hashes)

Uploaded Source

Built Distribution

wraptools-1.1-py2.py3-none-any.whl (10.0 kB view hashes)

Uploaded Python 2 Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page