wea 0.1.0

The Wrapped Exchange Array is a convenient way in order to exchange array data easily via processes or remote nodes

wea.py

The Wrapped Exchange Array is a convenient way in order to exchange array data easily via processes or remote nodes. Inspired and adopted partly from Julia’s InterProcessCommunication WrappedArray.

The wrapped exchange array can be accessed like a numpy array because under the hood, numpy is applied.

Getting started

Install the package from Pypi

pip install wea

Shared memory

import wea

...
wa = wea.shared_memory.create_wrapped_array('/awesome-1', np.dtype('float64'), (10, 2))
wa[:] = my_new_data[:]
...

Creating a shared memory segement

In order to create a new shared memory segment, use the following snippet

import wea
import numpy

type = np.dtype('float64')
dims = (10, 2)
wa = wea.shared_memory.create_wrapped_array('/awesome-1', type, dims)
wa[:] = np.random.randn(dims[0], dims[1])

If creating was not possible because the segment already exists , a FileExistsError exception will be thrown.

Attaching to an existing shared memory array

If a wrapped exchange array was already created, you can attach to it simply by

import wea
import numpy

wa = wea.shared_memory.attach_wrapped_array('/awesome-1')
wa[:] = np.random.randn(dims[0], dims[1])

The metadata of the array are stored in the shared memory header segment and will be retrieved for the numpy array creation.

If attaching was not possible because the segment does not exist so far, a FileNotFoundError exception will be thrown.