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Add examples for TagFilter #272

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lonvia merged 1 commit into from
Nov 10, 2024
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Add examples for TagFilter #272

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17 changes: 15 additions & 2 deletions docs/user_manual/04-Working-with-Filters.md
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Expand Up @@ -212,8 +212,21 @@ KeyFilter multiple times:

### TagFilter

This filter works exactly the same as the KeyFilter, only it looks for the
presence of whole tags (key and value) in the tag list of the object.
This filter works like KeyFilter, allowing both AND and OR combinations, but
it requires whole tags (key and value) in the object's tag list.
Tags are given as two-element tuples.

!!! example
```python
print("Objects with 'highway=primary' _or_ 'surface=asphalt' tags:",
sum(1 for o in osmium.FileProcessor('../data/liechtenstein.osm.pbf')
.with_filter(osmium.filter.TagFilter(('highway','primary'), ('surface','asphalt')))))

print("Objects with 'highway=primary' _and_ 'surface=asphalt' tags:",
sum(1 for o in osmium.FileProcessor('../data/liechtenstein.osm.pbf')
.with_filter(osmium.filter.TagFilter(('highway','primary')))
.with_filter(osmium.filter.TagFilter(('surface','asphalt')))))
```

### IdFilter

Expand Down