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Update code example for Ragged #756

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Merged
svlandeg merged 2 commits into from
Sep 9, 2022
Merged

Update code example for Ragged #756

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4f91aa5
Update code example for Ragged.
rmitsch Sep 6, 2022
e31861f
Import from thinc.api.
rmitsch Sep 6, 2022
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15 changes: 7 additions & 8 deletions website/docs/usage-sequences.md
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Original file line number Diff line number Diff line change
Expand Up @@ -146,24 +146,23 @@ of your network.

```python
### Example
from thinc.api import Ragged

from thinc.api import get_current_ops, Ragged, Linear
from thinc.api import get_current_ops, Ragged, Linear, list2ragged

ops = get_current_ops()
sequences = [
ops.alloc2f(7, 5) + 1,
ops.alloc2f(2, 5) + 2,
ops.alloc2f(4, 5) + 3,
]
ragged = ops.list2ragged(sequences)
list2ragged_model = list2ragged()
ragged = list2ragged_model.predict(sequences)
assert ragged.data.shape == (13, 5)
# This will always be true:
assert ragged.data.shape[0] == ragged.lengths.sum()
# Data from sequence 0 is in the first 7 rows, followed by seqs 1 and 2
assert ragged.data[:7] == 1
assert ragged.data[7:2] == 2
assert ragged.data[9:] == 3
assert (ragged.data[:7] == 1).all()
assert (ragged.data[7:2] == 2).all()
assert (ragged.data[9:] == 3).all()
# Indexing gets the batch item, and returns a Ragged object
ragged[0].data.shape == (7, 5)
# You can pass the data straight into dense layers
Expand All @@ -173,7 +172,7 @@ ragged_out = Ragged(output, ragged.lengths)
# Internally, data is reshaped to 2d. The original shape is accessible at the
# the dataXd property.
sequences3d = [ops.alloc3f(5, 6, 7), ops.alloc3f(10, 6, 7)]
ragged3d = ops.list2ragged(sequences3d)
ragged3d = list2ragged_model.predict(sequences3d)
ragged3d.data.shape == (15, 13)
ragged3d.dataXd.shape == (15, 6, 7)
```
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