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pymc-devs/mcbackend
example for continuing sampling from a periodically saved trace

Hi, Thank you for making this! I am a little unclear from the readme documentation how I would go about reloading the saved trace to continue an interrupted sampling. Ideally, I d like to determine the ...
help wanted
  • unaschneck
  • 1
  • Opened 
    on Mar 13, 2024
  • #109

pymc-devs/mcbackend
Sampler-wise tune stats are not recognized & `InferenceData` left with 0 draws

In https://github.com/pymc-devs/pymc/pull/6835 (released in PyMC v5.7.0) the emission of the tune stat was changed to be a sampler-wise thing, which is why McBackend can no longer find it in the stored ...
bug
  • michaelosthege
  • Opened 
    on Jan 17, 2024
  • #102

pymc-devs/mcbackend
"warmup_sample_stats" not saved in ClickHouse backend

I am running the following while running a local ClickHouse server (PyMC v.5.3.0): import arviz import numpy as np import pymc as pm import mcbackend as mcb from clickhouse_driver import Client def ...
  • thelogicalgrammar
  • 2
  • Opened 
    on May 23, 2023
  • #93

pymc-devs/mcbackend
Add `Chain.set_data` signature to set many/all draws at once

This is needed for copying draws/stats from other structures, or other chains: https://github.com/pymc-devs/pymc/blob/2a324bc04d65637f427858c519f2eb9c247ebc0b/pymc/backends/mcbackend.py#L188-L195
enhancement
schemas & signatures
  • michaelosthege
  • Opened 
    on Apr 12, 2023
  • #90

pymc-devs/mcbackend
Remove experimental Streamlit app

It s an experimental implementation that is not actively maintained. If someone is interested they can dig the history or ping me.
refactor
  • michaelosthege
  • Opened 
    on Feb 4, 2023
  • #81

pymc-devs/mcbackend
Use covariant input types such as `Mapping`

For example in https://github.com/michaelosthege/mcbackend/blob/a7087a8729812c49ec240aa7d45b8391a83e4875/mcbackend/core.py#L61
bug
refactor
schemas & signatures
  • michaelosthege
  • Opened 
    on Feb 4, 2023
  • #80

pymc-devs/mcbackend
`ClickHouseChain` batch inserting assumes that all calls to `.append()` pass similar dicts as the first call

The batch inserting mechanism creates the insert query based on the composition of draw and stats dicts of the very first call to .append(). Later on it assumes that all further calls have the identical ...
bug
  • michaelosthege
  • Opened 
    on Dec 20, 2022
  • #74

pymc-devs/mcbackend
Can't store `object` dtyped sampler warnings in `ClickHouseBackend`

Since PyMC v4.3.0 the sampler warnings are collected as stats, which means that they end up in the sampler_stats that the ClickHouseBackend is asked to collect. This leads to problems because object typed ...
bug
important
  • michaelosthege
  • Opened 
    on Dec 19, 2022
  • #73

pymc-devs/mcbackend
Protobuf encode/decode of NumPy arrays fails if they were F-ordered

Test case: from mcbackend.npproto.utils import ndarray_to_numpy, ndarray_from_numpy arrC = numpy.array([ [1,2,3], [4,5,6], ], order= C ) arrF = numpy.array([ [1,2,3], [4,5,6], ], order= ...
bug
  • michaelosthege
  • Opened 
    on Oct 9, 2022
  • #63

pymc-devs/mcbackend
`ClickHouseChain._get_row_at` fails when `var_name` has < 2 elements

The bug is as follows: chain.get_draws_at(10, [ slope ]) # produces this 👇 query ch_client.execute( SELECT (slope) FROM D1K4ZQ_chain_0 WHERE _draw_idx=10; ) # and this 👇 result [(0.6563459924884462,)] ...
bug
  • michaelosthege
  • Opened 
    on Aug 23, 2022
  • #56
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