hover configuration for constants

[robinsonkwame]

There are several constants that if configurable would allow the user to more flexibly use Hover. For example,

• There are several uses cases involving more than 20 labels where the user would be okay with repeated colors, currently hover throws an assert error: File "/hdd/work/anaconda3/envs/qca/lib/python3.10/site-packages/hover/utils/bokeh_helper.py", line 22, in auto_label_color assert len(use_labels) <= 20, "Too many labels to support (max at 20)"
• An earlier issue discusses customizing color

These and other configurability issue could be addressed by using Python's standard library configparaser. If the user changes the Hover configuration they would understand that the maintainers may not be able to help them.

[haochuanwei]

Sure, great point! The catch is that one may want to "lock" the configuration upon any read operation. We don't want the user to inadvertently mix two sets of configs in one process.

• the right scope to load custom configurations should be between import hover and the creation of any dataset/explorer objects that depend on the configuration values.
• probably a "ModuleConfig" object with config values as properties, and a hover.reconfigure() method to trigger the setter of those properties.

[haochuanwei]

@robinsonkwame With https://github.com/phurwicz/hover/commit/c4d1642be33466fdc62d3a593867fcaa6d4d1515, you can now use hover.config.update("myconfig.ini") where myconfig.ini looks like:

https://github.com/phurwicz/hover/blob/c4d1642be33466fdc62d3a593867fcaa6d4d1515/hover/config.ini#L1-L15

Two caveats:

• this change is not yet merged to main, you need to use nightly for the moment.
• if any hover component has already used a config value, that config value can no longer be assigned to.
  • so if you'd like to hover.config.update("myconfig.ini"), do it right after import hover.
  • this is by design to prevent error-prone mixed configs. Made possible through LockableConfig.

[robinsonkwame]

excellent 👍🏽

[haochuanwei]

Color palette configuration is in progress. I found that bokeh has accessible palettes actually, just need a way to make this easy to configure and hard to slip up. Stay tuned :)

[haochuanwei]

How to use a custom palette

from bokeh.palettes import Turbo256

# you can use a bokeh built-in palette, or any iterable of hex-colors like "#dcdcdc"
hover.config["visual"]["bokeh_palette"] = Turbo256

See bokeh.palettes for more info on what's available.

How to list the config options and what value to use

We have added more configurable options inside hover.config.

hover.config.hint() will show this:

{'data.columns': {'dataset_subset_field': 'The column name for dataset '
                                          'subsets.. Example: SUBSET',
                  'embedding_field_prefix': 'The prefix of column names for '
                                            'embedding coordinates.. Example: embed_',
                  'encoded_label_key': 'The column name for the encoded '
                                       'label.. Example: label_encoded',
                  'search_score_field': "The column name for data points' "
                                        'score from search widgets.. Example: '
                                        '__SEARCH_SCORE__',
                  'source_alpha_field': 'The column name for plotted data '
                                        'point color alpha (opacity).. '
                                        'Example: __ALPHA__',
                  'source_color_field': 'The column name for plotted data '
                                        'point color.. Example: __COLOR__'},
 'data.embedding': {'default_reduction_method': 'Default method for '
                                                'dimensionality reduction. '
                                                "Currently either 'umap' or "
                                                "'ivis'.. Example: umap"},
 'data.values': {'abstain_decoded': "The placeholder label indicating 'no "
                                    "label yet'.. Example: ABSTAIN",
                 'abstain_encoded': "The encoded value of 'no label yet' which "
                                    'should almost always be -1, never 0 or '
                                    'positive.. Example: -1'},
 'io': {'data_save_dir': 'The directory path for saving labeled data.. '
                         'Example: .'},
 'visual': {'abstain_hexcolor': 'Hex code of RGB color.. Example: #dcdcdc',
            'bokeh_palette': 'The bokeh color palette to use for plotting.. '
                             "Example: ('#30123b', '#311542', '#32184a', "
                             "'#341b51', '#351e58', '#36215f', '#372365', "
                             "'#38266c', '#392972', '#3a2c79', '#3b2f7f', "
                             "'#3c3285', '#3c358b', '#3d3791', '#3e3a96', "
                             "'#3f3d9c', '#4040a1', '#4043a6', '#4145ab', "
                             "'#4148b0', '#424bb5', '#434eba', '#4350be', "
                             "'#4353c2', '#4456c7', '#4458cb', '#455bce', "
                             "'#455ed2', '#4560d6', '#4563d9', '#4666dd', "
                             "'#4668e0', '#466be3', '#466de6', '#4670e8', "
                             "'#4673eb', '#4675ed', '#4678f0', '#467af2', "
                             "'#467df4', '#467ff6', '#4682f8', '#4584f9', "
                             "'#4587fb', '#4589fc', '#448cfd', '#438efd', "
                             "'#4291fe', '#4193fe', '#4096fe', '#3f98fe', "
                             "'#3e9bfe', '#3c9dfd', '#3ba0fc', '#39a2fc', "
                             "'#38a5fb', '#36a8f9', '#34aaf8', '#33acf6', "
                             "'#31aff5', '#2fb1f3', '#2db4f1', '#2bb6ef', "
                             "'#2ab9ed', '#28bbeb', '#26bde9', '#25c0e6', "
                             "'#23c2e4', '#21c4e1', '#20c6df', '#1ec9dc', "
                             "'#1dcbda', '#1ccdd7', '#1bcfd4', '#1ad1d2', "
                             "'#19d3cf', '#18d5cc', '#18d7ca', '#17d9c7', "
                             "'#17dac4', '#17dcc2', '#17debf', '#18e0bd', "
                             "'#18e1ba', '#19e3b8', '#1ae4b6', '#1be5b4', "
                             "'#1de7b1', '#1ee8af', '#20e9ac', '#22eba9', "
                             "'#24eca6', '#27eda3', '#29eea0', '#2cef9d', "
                             "'#2ff09a', '#32f197', '#35f394', '#38f491', "
                             "'#3bf48d', '#3ff58a', '#42f687', '#46f783', "
                             "'#4af880', '#4df97c', '#51f979', '#55fa76', "
                             "'#59fb72', '#5dfb6f', '#61fc6c', '#65fc68', "
                             "'#69fd65', '#6dfd62', '#71fd5f', '#74fe5c', "
                             "'#78fe59', '#7cfe56', '#80fe53', '#84fe50', "
                             "'#87fe4d', '#8bfe4b', '#8efe48', '#92fe46', "
                             "'#95fe44', '#98fe42', '#9bfd40', '#9efd3e', "
                             "'#a1fc3d', '#a4fc3b', '#a6fb3a', '#a9fb39', "
                             "'#acfa37', '#aef937', '#b1f836', '#b3f835', "
                             "'#b6f735', '#b9f534', '#bbf434', '#bef334', "
                             "'#c0f233', '#c3f133', '#c5ef33', '#c8ee33', "
                             "'#caed33', '#cdeb34', '#cfea34', '#d1e834', "
                             "'#d4e735', '#d6e535', '#d8e335', '#dae236', "
                             "'#dde036', '#dfde36', '#e1dc37', '#e3da37', "
                             "'#e5d838', '#e7d738', '#e8d538', '#ead339', "
                             "'#ecd139', '#edcf39', '#efcd39', '#f0cb3a', "
                             "'#f2c83a', '#f3c63a', '#f4c43a', '#f6c23a', "
                             "'#f7c039', '#f8be39', '#f9bc39', '#f9ba38', "
                             "'#fab737', '#fbb537', '#fbb336', '#fcb035', "
                             "'#fcae34', '#fdab33', '#fda932', '#fda631', "
                             "'#fda330', '#fea12f', '#fe9e2e', '#fe9b2d', "
                             "'#fe982c', '#fd952b', '#fd9229', '#fd8f28', "
                             "'#fd8c27', '#fc8926', '#fc8624', '#fb8323', "
                             "'#fb8022', '#fa7d20', '#fa7a1f', '#f9771e', "
                             "'#f8741c', '#f7711b', '#f76e1a', '#f66b18', "
                             "'#f56817', '#f46516', '#f36315', '#f26014', "
                             "'#f15d13', '#ef5a11', '#ee5810', '#ed550f', "
                             "'#ec520e', '#ea500d', '#e94d0d', '#e84b0c', "
                             "'#e6490b', '#e5460a', '#e3440a', '#e24209', "
                             "'#e04008', '#de3e08', '#dd3c07', '#db3a07', "
                             "'#d93806', '#d73606', '#d63405', '#d43205', "
                             "'#d23005', '#d02f04', '#ce2d04', '#cb2b03', "
                             "'#c92903', '#c72803', '#c52602', '#c32402', "
                             "'#c02302', '#be2102', '#bb1f01', '#b91e01', "
                             "'#b61c01', '#b41b01', '#b11901', '#ae1801', "
                             "'#ac1601', '#a91501', '#a61401', '#a31201', "
                             "'#a01101', '#9d1001', '#9a0e01', '#970d01', "
                             "'#940c01', '#910b01', '#8e0a01', '#8b0901', "
                             "'#870801', '#840701', '#810602', '#7d0502', "
                             "'#7a0402')"}}

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