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A module that allows you to create views of your sequences or its slices

Project description

dataview is a module that allows you to create views of your sequences or its slices

Install

pip install dataview

To upgrade a previous installation, use:

pip install dataview

Usage && Examples

>>> from dataview import DataView
>>> # You have some data, it can be any sequence (str, list, bytes, tuple, etc..)
>>> source_data = list(range(5))
>>> # DataView is just a pointer to your source_data and start/stop/step
>>> DataView(source_data)
[0, 1, 2, 3, 4]
>>> DataView(source_data, 3)
[0, 1, 2]
>>> DataView(source_data, 1, 5)
[1, 2, 3, 4]
>>> DataView(source_data, None, None, -1)
[4, 3, 2, 1, 0]
>>> # You can use slices (completely the same way as list slices)
>>> DataView(source_data)[::-1]
[4, 3, 2, 1, 0]
>>> # Slice return a new DataView object, that points to the previous DataView
>>> DataView(source_data)[::-1][2:4]
[2, 1]
>>> # You can change start/stop/step anytime
>>> view = DataView(source_data, 0, 1)
>>> view.start = 1
>>> view.stop = 2
>>> view
[1]
>>> # View always points to actual data
>>> source_data[1] = 2
>>> view
[2]
>>> # You can change a view source data
>>> view.data = list(range(5))
>>> view
[1]

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