Feature/dataarray

[willu47]

A DataArray is a thin wrapper class around:

• xarray.DataArray
• pandas.Series
• numpy.ndarray

It provides a convenient bundle of data and metadata which saves on numerous duplicate calls to obtain the Spec of an input, output and parameter, particularly for methods on the DataHandle, such as get_data, get_parameter and get_results and corresponding methods on the DataInterface. As such, all methods that previously returned data, now return a DataArray allowing operations on the data to be completed without a separate call to obtain the data Spec.

This work highlighted a few issues:

• inconsistent interface for writing scenarios across DataInterface implementations - fixed and tested
• issues with writing spatial data - bug report raised
• ndarray_to_list helper function didn't support writing for timesteps - fixed and tested

To do:

• [x] complete implementation for write methods

[codecov[bot]]

Codecov Report

Merging #237 into develop will increase coverage by 0.1%. The diff coverage is 82.58%.

@@            Coverage Diff             @@
##           develop     #237     +/-   ##
==========================================
+ Coverage    78.04%   78.14%   +0.1%     
==========================================
  Files           50       51      +1     
  Lines         3939     4036     +97     
  Branches       498      510     +12     
==========================================
+ Hits          3074     3154     +80     
- Misses         778      791     +13     
- Partials        87       91      +4

Flag	Coverage Δ
#javascript	78.14% <82.58%> (+0.1%)	:arrow_up:
#python	83.93% <82.58%> (-0.05%)	:arrow_down:

Impacted Files	Coverage Δ
src/smif/data_layer/database_interface.py	100% <100%> (ø)	:arrow_up:
src/smif/data_layer/memory_interface.py	96.29% <100%> (+0.18%)	:arrow_up:
src/smif/model/model.py	100% <100%> (ø)	:arrow_up:
src/smif/data_layer/data_array.py	75.75% <75.75%> (ø)
src/smif/data_layer/data_handle.py	82.23% <76.47%> (-2.11%)	:arrow_down:
src/smif/data_layer/datafile_interface.py	84.9% <83.33%> (+1.05%)	:arrow_up:
src/smif/data_layer/data_interface.py	93.9% <85.71%> (-2.93%)	:arrow_down:
src/smif/metadata/coordinates.py	97.05% <0%> (-2.95%)	:arrow_down:

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