Tags-aware dictionary

Contents:

• taggedict package
  • Module contents

Dictionary that uses frozenset of tags as actual key and allows indexing by subset or individual tag. All standard dict operations inherited from dict, but indexing by slice allows some set operations and returns an iterator.

The following indexing conventions are followed:

• When key is a sequence, it first converted to frozenset(), then used as an ordinary dictionary key

• When key is a slice, with non-empty «start» field (as in Dict[key:]), the resulting operation is performed over the sequence of items tagged

• When key is a slice, the resulting operation is performed over the sequence of items, i. e. key, value pairs, tagged by key tag — that means key is among value frozenset.

  • Slice with non-empty «start» part (as in Dict[key:]) generates a sequence of items tagged by key tag

  • Slice with non-empty «stop» part (as in Dict[:keys]) generates a sequence of items tagged by all the files in keys sequence

  • Slice with non-empty «step» part (as in Dict[::keys]) generates a sequence of items tagged by any tag from keys sequence

Additionally, Tagged[slice] = tags construction is used for adding tags to values, not to change items themselves.

Examples

TODO

Indices and tables

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