LazyLattice and LazyConcept

[mikulatomas]

Hi :)

I am currently testing WIP demo implementation of something i call LazyLattice (and LazyConcept).

Typical application is when you wanna construct Lattice with one concept and find its upper and lower neighbours (and nothing more).

Biggest priority was to keep the API as close as possible, because users could want to use Concept and LazyConcept as interchangeable arguments to other functions.

The whole magic is here and here.

Are you interested in this feature in the main branch? It is still work in progress (no docstring, API not complete etc.). This feature is necessary for my research so I will implement i anyway (in fcapsy package, which should still keep compatibility).

Ideas are welcomed :) (btw I feel that this feature is more important than #15)

Small demo:

from concepts import Context

c = Context.fromstring('''
           |human|knight|king |mysterious|
King Arthur|  X  |  X   |  X  |          |
Sir Robin  |  X  |  X   |     |          |
holy grail |     |      |     |     X    |
''')

lazy_concept = c.lazy_lattice[["King Arthur"]]
# <LazyConcept {King Arthur} <-> [human knight king]>

len(c.lazy_lattice)
# 1

lazy_concept.upper_neighbors
# (<LazyConcept {King Arthur, Sir Robin} <-> [human knight]>,)

len(c.lazy_lattice)
# 2

lazy_concept.lower_neighbors
# (<LazyConcept {} <-> [human knight king mysterious]>,)

len(c.lazy_lattice)
# 3

lazy_concept.upper_neighbors
# (<LazyConcept {King Arthur, Sir Robin} <-> [human knight]>,)

len(c.lazy_lattice)
# 3 - nothing was added

[codecov-commenter]

Codecov Report

Merging #22 (89137f7) into master (e1d73a8) will decrease coverage by 3.76%.
The diff coverage is 43.80%.

@@             Coverage Diff             @@
##            master      #22      +/-   ##
===========================================
- Coverage   100.00%   96.23%   -3.77%     
===========================================
  Files           23       25       +2     
  Lines         1462     1567     +105     
===========================================
+ Hits          1462     1508      +46     
- Misses           0       59      +59     

Impacted Files	Coverage Δ
concepts/lazy_lattice_members.py	41.53% <41.53%> (ø)
concepts/lazy_lattices.py	44.44% <44.44%> (ø)
concepts/contexts.py	99.50% <75.00%> (-0.50%)	⬇️

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[mikulatomas]

just rebased to current master, no changes :)