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Track changes to mutable data types.

Project description

Build Status Documentation Status Version Info

Spectate

A library for Python 2 and 3 that can track changes to mutable data types.

With spectate complicated protocols for managing updates, don't need to be the outward responsibility of a user, and can instead be done automagically in the background. For instance, syncing the state between a server and client can controlled by spectate so user's don't have to.

Documentation

https://python-spectate.readthedocs.io/en/latest/

Install

  • stable : pip install spectate
  • master : pip install git+https://github.com/rmorshea/spectate.git#egg=spectate
  • developer : git clone https://github.com/rmorshea/spectate && cd spectate/ && pip install -e . -r requirements.txt

At A Glance

If you're using Python 3.6 and above, create a model object

from spectate import mvc

l = mvc.List()

Register a view function to it that observes changes

@mvc.view(l)
def printer(l, events):
    for e in events:
        print(e)

Then modify your object and watch the view function react

l.append(0)
l[0] = 1
l.extend([2, 3])
{'index': 0, 'old': Undefined, 'new': 0}
{'index': 0, 'old': 0, 'new': 1}
{'index': 1, 'old': Undefined, 'new': 2}
{'index': 2, 'old': Undefined, 'new': 3}

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