BlobArrayBuilder

class dsviper.BlobArrayBuilder(blob_layout, count)

Bases: object

Fills the bytes of one typed array, then seals them into a ValueBlob.

Write through the buffer protocol, by index, or with copy(); build() hands the bytes over once. A blob’s bytes never change afterwards.

blob_layout() → BlobLayout

Return the BlobLayout of one element: its data type and how many components it packs.

build() → ValueBlob

Return the ValueBlob of the bytes written so far, and empty the builder.

The bytes are moved, not copied, so a value never shares them with a writer: every later write is refused. Fails while a buffer of this builder is still exported — release the memoryview, or delete the NumPy array holding it, first.

byte_count() → int

Return how many bytes the array occupies.

copy(buffer: Buffer) → None

Write buffer over the whole array; its size must match byte_count().

count() → int

Return how many elements the array holds, fixed at construction.

is_built() → bool

Return whether build() has handed the bytes over to a blob.