pychromy 0.2.0

Exact joint inclusion probabilities: joint_inclusion() evaluates Chauvet and Le Gleut's (2021) closed forms for the without-replacement design, under the random head or the fixed list; with them the Sen-Yates-Grundy variance of the Horvitz-Thompson total is exact. Engine chromy-core 0.2.0.

pychromy 0.1.1

Engine 0.1.1: minimum replacement verified as a runtime invariant on every selection (adopted from Clara Ribeiro de Santana's independent cumulative formulation of the method). PyPI long description updated with the DOI.

pychromy 0.1.0

First release: Chromy's sequential sampling with probability minimum replacement, from Python — PyO3 bindings of chromy-core (abi3, Python ≥ 3.9, no Python dependencies). A whole design in one call, reproducible from its seed; golden-tested against the same reference fixtures as the engine and the R package. On PyPI as pychromy 0.1.0.