PR: Implement support for slugs to "colour.utilities.CaseInsensitiveMapping" class. #993

KelSolaar · 2022-06-01T10:45:52Z

Summary

This PR implements support for slugs to colour.utilities.CaseInsensitiveMapping class as suggested in #991.

Two new methods have been added:

colour.utilities.CaseInsensitiveMapping.slugified_keys
colour.utilities.CaseInsensitiveMapping.slugified_items

They leverage the new colour.utilities.slugify definition copied from Django.

>>> import colour
>>> colour.RGB_COLOURSPACES['ALEXA Wide Gamut'].name
'ALEXA Wide Gamut'
>>> colour.RGB_COLOURSPACES['alexa-wide-gamut'].name
'ALEXA Wide Gamut'
>>> 'ALEXA Wide Gamut' in colour.RGB_COLOURSPACES
True
>>> 'alexa-wide-gamut' in colour.RGB_COLOURSPACES
True
>>> del colour.RGB_COLOURSPACES['alexa-wide-gamut']
>>> 'ALEXA Wide Gamut' in colour.RGB_COLOURSPACES
False
>>> list(colour.RGB_COLOURSPACES.slugified_keys())
['aces2065-1', 'acescc', 'acescct', 'acescg', 'acesproxy', 'adobe-rgb-1998', 'adobe-wide-gamut-rgb', 'apple-rgb', 'best-rgb', 'beta-rgb', 'blackmagic-wide-gamut', 'cie-rgb', 'cinema-gamut', 'colormatch-rgb', 'dcdm-xyz', 'dci-p3', 'dci-p3', 'dji-d-gamut', 'dragoncolor', 'dragoncolor2', 'davinci-wide-gamut', 'display-p3', 'don-rgb-4', 'eci-rgb-v2', 'erimm-rgb', 'ekta-space-ps-5', 'f-gamut', 'filmlight-e-gamut', 'itu-r-bt2020', 'itu-r-bt470-525', 'itu-r-bt470-625', 'itu-r-bt709', 'max-rgb', 'n-gamut', 'ntsc-1953', 'ntsc-1987', 'p3-d65', 'palsecam', 'prophoto-rgb', 'protune-native', 'redwidegamutrgb', 'redcolor', 'redcolor2', 'redcolor3', 'redcolor4', 'rimm-rgb', 'romm-rgb', 'russell-rgb', 's-gamut', 's-gamut3', 's-gamut3cine', 'smpte-240m', 'smpte-c', 'sharp-rgb', 'v-gamut', 'venice-s-gamut3', 'venice-s-gamut3cine', 'xtreme-rgb', 'srgb', 'aces', 'adobe1998', 'prophoto']
>>> list(colour.RGB_COLOURSPACES.slugified_items())[:5]
[('aces2065-1', RGB_Colourspace('ACES2065-1',
                [[  7.34700000e-01,   2.65300000e-01],
                 [  0.00000000e+00,   1.00000000e+00],
                 [  1.00000000e-04,  -7.70000000e-02]],
                [ 0.32168,  0.33767],
                'ACES',
                [[  9.52552396e-01,   0.00000000e+00,   9.36786000e-05],
                 [  3.43966450e-01,   7.28166097e-01,  -7.21325464e-02],
                 [  0.00000000e+00,   0.00000000e+00,   1.00882518e+00]],
                [[  1.04981102e+00,   0.00000000e+00,  -9.74845000e-05],
                 [ -4.95903023e-01,   1.37331305e+00,   9.82400361e-02],
                 [  0.00000000e+00,   0.00000000e+00,   9.91252018e-01]],
                linear_function,
                linear_function,
                False,
                False)), ('acescc', RGB_Colourspace('ACEScc',
                [[ 0.713,  0.293],
                 [ 0.165,  0.83 ],
                 [ 0.128,  0.044]],
                [ 0.32168,  0.33767],
                'ACES',
                [[ 0.66245418,  0.13400421,  0.15618769],
                 [ 0.27222872,  0.67408177,  0.05368952],
                 [-0.00557465,  0.00406073,  1.0103391 ]],
                [[ 1.64102338, -0.32480329, -0.2364247 ],
                 [-0.66366286,  1.61533159,  0.01675635],
                 [ 0.01172189, -0.00828444,  0.98839486]],
                log_encoding_ACEScc,
                log_decoding_ACEScc,
                False,
                False)), ('acescct', RGB_Colourspace('ACEScct',
                [[ 0.713,  0.293],
                 [ 0.165,  0.83 ],
                 [ 0.128,  0.044]],
                [ 0.32168,  0.33767],
                'ACES',
                [[ 0.66245418,  0.13400421,  0.15618769],
                 [ 0.27222872,  0.67408177,  0.05368952],
                 [-0.00557465,  0.00406073,  1.0103391 ]],
                [[ 1.64102338, -0.32480329, -0.2364247 ],
                 [-0.66366286,  1.61533159,  0.01675635],
                 [ 0.01172189, -0.00828444,  0.98839486]],
                log_encoding_ACEScct,
                log_decoding_ACEScct,
                False,
                False)), ('acescg', RGB_Colourspace('ACEScg',
                [[ 0.713,  0.293],
                 [ 0.165,  0.83 ],
                 [ 0.128,  0.044]],
                [ 0.32168,  0.33767],
                'ACES',
                [[ 0.66245418,  0.13400421,  0.15618769],
                 [ 0.27222872,  0.67408177,  0.05368952],
                 [-0.00557465,  0.00406073,  1.0103391 ]],
                [[ 1.64102338, -0.32480329, -0.2364247 ],
                 [-0.66366286,  1.61533159,  0.01675635],
                 [ 0.01172189, -0.00828444,  0.98839486]],
                linear_function,
                linear_function,
                False,
                False)), ('acesproxy', RGB_Colourspace('ACESproxy',
                [[ 0.713,  0.293],
                 [ 0.165,  0.83 ],
                 [ 0.128,  0.044]],
                [ 0.32168,  0.33767],
                'ACES',
                [[ 0.66245418,  0.13400421,  0.15618769],
                 [ 0.27222872,  0.67408177,  0.05368952],
                 [-0.00557465,  0.00406073,  1.0103391 ]],
                [[ 1.64102338, -0.32480329, -0.2364247 ],
                 [-0.66366286,  1.61533159,  0.01675635],
                 [ 0.01172189, -0.00828444,  0.98839486]],
                log_encoding_ACESproxy,
                log_decoding_ACESproxy,
                False,
                False))]

All the objects using the colour.utilities.CaseInsensitiveMapping class and its colour.utilities.LazyCaseInsensitiveMapping sub-class should now have the same capabilities:

>>> list(colour.MSDS_CMFS.slugified_keys())
['stockman-sharpe-2-degree-cone-fundamentals', 'stockman-sharpe-10-degree-cone-fundamentals', 'smith-pokorny-1975-normal-trichromats', 'wright-guild-1931-2-degree-rgb-cmfs', 'stiles-burch-1955-2-degree-rgb-cmfs', 'stiles-burch-1959-10-degree-rgb-cmfs', 'cie-1931-2-degree-standard-observer', 'cie-1964-10-degree-standard-observer', 'cie-2012-2-degree-standard-observer', 'cie-2012-10-degree-standard-observer', 'cie-2015-2-degree-standard-observer', 'cie-2015-10-degree-standard-observer', 'cie_2_1931', 'cie_10_1964']
>>> list(colour.SDS_ILLUMINANTS.slugified_keys())
['a', 'b', 'c', 'd50', 'd55', 'd60', 'd65', 'd75', 'e', 'fl1', 'fl2', 'fl3', 'fl4', 'fl5', 'fl6', 'fl7', 'fl8', 'fl9', 'fl10', 'fl11', 'fl12', 'fl31', 'fl32', 'fl33', 'fl34', 'fl35', 'fl36', 'fl37', 'fl38', 'fl39', 'fl310', 'fl311', 'fl312', 'fl313', 'fl314', 'fl315', 'hp1', 'hp2', 'hp3', 'hp4', 'hp5', 'led-b1', 'led-b2', 'led-b3', 'led-b4', 'led-b5', 'led-bh1', 'led-rgb1', 'led-v1', 'led-v2', 'id65', 'id50', 'iso-7589-photographic-daylight', 'iso-7589-sensitometric-daylight', 'iso-7589-studio-tungsten', 'iso-7589-sensitometric-studio-tungsten', 'iso-7589-photoflood', 'iso-7589-sensitometric-photoflood', 'iso-7589-sensitometric-printer']

Preflight

Code Style and Quality

Unit tests have been implemented and passed.
Mypy static checking has been run and passed.
Pre-commit hooks have been run and passed.
[N/A] New transformations have been added to the Automatic Colour Conversion Graph.
[N/A] New transformations have been exported to the relevant namespaces, e.g. colour, colour.models.

Documentation

New features are documented along with examples if relevant.
The documentation is Sphinx and numpydoc compliant.

coveralls · 2022-06-01T11:34:10Z

Coverage increased (+0.0004%) to 99.853% when pulling 4aa7de4 on feature/slugify into 09413da on develop.

zachlewis

This is perfect. Excellent choice of slugifiers, it seems to behave well with everything I throw at it. Thanks Thomas.

Now, maybe this is too much magic, but what would you think about making sluggified lookups delimiter-insensitive?

For example, slugify produces the following for variations of "Sony S-Log3 S-Gamut3.Cine":

{
 'Sony S-Log3 S-Gamut3.cine':  'sony-s-log3-s-gamut3cine',
 'SONY_SLOG3-SGAMUT3.CINE':    'sony_slog3-sgamut3cine',
 'sony_slog3_sgamut3cine':     'sony_slog3_sgamut3cine',
 'Sony: SLog3 / SGamut3.Cine': 'sony-slog3-sgamut3cine',
 'Sony: SLog3/SGamut3Cine':    'sony-slog3sgamut3cine',
 'Sony: S-Log3/S-Gamut3.Cine': 'sony-s-log3s-gamut3cine',
 'Sony/SLog3_SGamut3Cine':     'sonyslog3_sgamut3cine',
}

KelSolaar · 2022-06-04T00:32:05Z

Not a bad idea, probably a bit dangerous but I guess we are reaching a point where CaseInsensitiveMapping is not appropriate name. There is also an increased risk of key collisions but it is probably not too bad.

Any idea for an alternative name?

KelSolaar · 2022-06-04T00:43:21Z

Here are few ideas after wandering on thesaurus.com:

colour.utilities.BareMapping
colour.utilities.DecreasedMapping
colour.utilities.DestituteMapping
colour.utilities.FlatMapping
colour.utilities.InsensitiveMapping
colour.utilities.LiteralMapping
colour.utilities.PlainMapping
colour.utilities.ReducedMapping
colour.utilities.StrictMapping
colour.utilities.StrippedMapping

zachlewis · 2022-06-06T15:30:44Z

With the exception of DCI-P3+, I think we’re probably okay in terms of name collisions, at least for colour’s purposes. I think the benefits of resolving very-similar-but-ever-so-slightly-different permutations of a string encoding very specific information outweigh the detriments of potential alias collisions. I can’t really imagine a case where “SGAMUT3CINE” and “S-Gamut3.Cine” intend to refer to different things.

As for the naming of the object… hmmm. Tricky. Off the top of my head… CaseDelimiterInsensitiveLookup, InsensitiveLookup, PermissiveLookup, FuzzyLookup, AliasedLookup?

Maybe CanonicalMapping?

KelSolaar · 2022-06-08T09:16:03Z

Quite like CanonicalMapping: https://www.dictionary.com/browse/canonical

Mathematics. (of an equation, coordinate, etc.) in simplest or standard form.

KelSolaar · 2022-06-08T09:18:24Z

:D

KelSolaar · 2022-06-12T00:21:40Z

@zachlewis : Changes are up!

Note that we have the expected issue with dcip3:

>>> list(colour.RGB_COLOURSPACES.canonical_keys())
['aces20651', 'acescc', 'acescct', 'acescg', 'acesproxy', 'adobergb1998', 'adobewidegamutrgb', 'applergb', 'bestrgb', 'betargb', 'blackmagicwidegamut', 'ciergb', 'cinemagamut', 'colormatchrgb', 'dcdmxyz', 'dcip3', 'dcip3', 'djidgamut', 'dragoncolor', 'dragoncolor2', 'davinciwidegamut', 'displayp3', 'donrgb4', 'ecirgbv2', 'erimmrgb', 'ektaspaceps5', 'fgamut', 'filmlightegamut', 'iturbt2020', 'iturbt470525', 'iturbt470625', 'iturbt709', 'maxrgb', 'ngamut', 'ntsc1953', 'ntsc1987', 'p3d65', 'palsecam', 'prophotorgb', 'protunenative', 'redwidegamutrgb', 'redcolor', 'redcolor2', 'redcolor3', 'redcolor4', 'rimmrgb', 'rommrgb', 'russellrgb', 'sgamut', 'sgamut3', 'sgamut3cine', 'smpte240m', 'smptec', 'sharprgb', 'vgamut', 'venicesgamut3', 'venicesgamut3cine', 'xtremergb', 'srgb', 'aces', 'adobe1998', 'prophoto']
>>> colour.RGB_COLOURSPACES['dcip3']
RGB_Colourspace('DCI-P3+',
                [[ 0.74,  0.27],
                 [ 0.22,  0.78],
                 [ 0.09, -0.09]],
                [ 0.314,  0.351],
                'DCI-P3',
                [[ 0.55907356,  0.24893595,  0.08657739],
                 [ 0.2039863 ,  0.88259109, -0.08657739],
                 [-0.00755505,  0.        ,  0.961971  ]],
                [[ 1.99040349, -0.56139586, -0.22966194],
                 [-0.45849279,  1.262346  ,  0.15487549],
                 [ 0.01563207, -0.00440904,  1.03772867]],
                functools.partial(<function gamma_function at 0x156105550>, exponent=0.3846153846153846),
                functools.partial(<function gamma_function at 0x156105550>, exponent=2.6),
                False,
                False)

I suppose we could rename it...

…ng" class.

…lities.CanonicalMapping" and "colour.utilities.LazyCaseInsensitiveMapping" class to "colour.utilities.LazyCanonicalMapping".

…onicalMapping" class.

zachlewis · 2022-06-18T01:13:15Z

colour/models/rgb/datasets/dci_p3.py

@@ -127,7 +127,7 @@
 """

 RGB_COLOURSPACE_DCI_P3_P: RGB_Colourspace = RGB_Colourspace(
-    "DCI-P3+",
+    "DCI-P3-P",


zachlewis

Thank you. This is lurvely.

KelSolaar added this to the v0.4.2 milestone Jun 1, 2022

KelSolaar requested a review from zachlewis June 1, 2022 11:40

KelSolaar force-pushed the feature/slugify branch from f8475dc to fbb0887 Compare June 2, 2022 08:54

zachlewis approved these changes Jun 3, 2022

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KelSolaar force-pushed the feature/slugify branch 2 times, most recently from 620beb2 to 2bc02ac Compare June 11, 2022 23:51

KelSolaar force-pushed the feature/slugify branch 2 times, most recently from f9dbf64 to 7feae1b Compare June 12, 2022 02:36

KelSolaar added 2 commits June 13, 2022 22:07

Add "colour.utilities.slugify" definition.

914b27b

Implement support for slugs to "colour.utilities.CaseInsensitiveMappi…

4ec7c55

…ng" class.

KelSolaar force-pushed the feature/slugify branch from 0291528 to 4ac9596 Compare June 13, 2022 10:07

KelSolaar added 4 commits June 13, 2022 23:16

Rename "colour.utilities.CaseInsensitiveMapping" class to "colour.uti…

f3490c2

…lities.CanonicalMapping" and "colour.utilities.LazyCaseInsensitiveMapping" class to "colour.utilities.LazyCanonicalMapping".

Implement support for canonical keys.

7d53f3e

Rename "DCI-P3+" to "DCI-P3-P" to avoid canonical key collisions.

b2b28e5

Implement support for warnings on collisions in "colour.utilities.Can…

4aa7de4

…onicalMapping" class.

KelSolaar force-pushed the feature/slugify branch from 4ac9596 to 4aa7de4 Compare June 13, 2022 11:16

zachlewis reviewed Jun 18, 2022

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zachlewis approved these changes Jun 18, 2022

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KelSolaar merged commit 7d501cf into develop Jun 18, 2022

KelSolaar deleted the feature/slugify branch June 18, 2022 01:27

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PR: Implement support for slugs to "colour.utilities.CaseInsensitiveMapping" class. #993

PR: Implement support for slugs to "colour.utilities.CaseInsensitiveMapping" class. #993

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PR: Implement support for slugs to "colour.utilities.CaseInsensitiveMapping" class. #993

PR: Implement support for slugs to "colour.utilities.CaseInsensitiveMapping" class. #993

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Summary

Preflight

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