lmcinnes/pynndescent

View on GitHub

A Python nearest neighbor descent for approximate nearest neighbors

Stars: 970
Forks: 107
Open beginner issues: 0
Indexed issues: 75

Dominant language: Python
License: BSD-2-Clause
Last GitHub push: Aug 1, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

75 open issues indexed

Add support for nan_euclidean distance metric Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#255 · 2 comments · Opened Aug 30, 2025
Crashing on Import Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#253 · 1 comment · Opened Apr 28, 2025
Rebuilding new Pyn descent(numba 0.60, python 3.12) object from existing object(python 3.9)) Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

lmcinnes/pynndescent#252 · Opened Feb 24, 2025
Loading indices across various python versions Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#251 · Opened Jan 25, 2025
make_heap code object inequality at import time Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#250 · 5 comments · Opened Dec 16, 2024
Numba TypingError - too many positional arguments when trying to load saved umap models with v0.5.13 Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

lmcinnes/pynndescent#247 · 2 comments · Opened Aug 30, 2024
Updating a compressed index fails with `AttributeError: 'NNDescent' object has no attribute '_neighbor_graph'` Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

lmcinnes/pynndescent#246 · 2 comments · Opened Aug 11, 2024
Speed-up Indexing with custom metrics Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#245 · 1 comment · Opened Jul 31, 2024
1 test fails: ZeroDivisionError: division by zero Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

lmcinnes/pynndescent#239 · Opened Apr 28, 2024
Querying the training set: runtime tradeoff for large k Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#237 · 2 comments · Opened Feb 22, 2024
Reverse diversification is actually forward diversification again Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#234 · Opened Dec 29, 2023
TSSS missing a factor of 2 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#233 · Opened Dec 9, 2023
true_angular is not a distance? Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

lmcinnes/pynndescent#232 · Opened Nov 12, 2023
Minor bias in split selection? Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

lmcinnes/pynndescent#228 · 1 comment · Opened Oct 21, 2023
API to save and load index from disk Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#227 · 6 reactions · Opened Sep 11, 2023
Specifying threshold in distance metrics Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#221 · Opened Jun 27, 2023
Very high memory usage Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#220 · 7 comments · 1 reaction · Opened Jun 19, 2023
Slice error using mac M1-max ARM Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#218 · 6 comments · Opened May 10, 2023
Newest version breaks with UMAP Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

lmcinnes/pynndescent#217 · 3 comments · 1 reaction · Opened Apr 19, 2023
Question about covariance matrix used when using Mahalanobis distance Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

lmcinnes/pynndescent#215 · Opened Apr 12, 2023
Cosine metric - error "Negative values in data passed to precomputed distance matrix" Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

lmcinnes/pynndescent#214 · 2 comments · Opened Mar 18, 2023
uint8 as internal data Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

lmcinnes/pynndescent#213 · 1 comment · 1 reaction · Opened Mar 7, 2023
Sample identifiers for semantic search Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#212 · 2 comments · Opened Feb 27, 2023
access distances in heap Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#211 · 3 comments · Opened Feb 23, 2023
Fatal Python error: Segmentation faultFatal Python error: Segmentation fault Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#201 · 1 comment · Opened Sep 28, 2022
self implemented distance metric Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#200 · 3 comments · Opened Sep 17, 2022
Importing pickled index gives error - 'NNDescent' object has no attribute 'shape' Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#197 · 1 comment · Opened Aug 19, 2022
When distance computation is expensive how to gradually build graph Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#194 · 3 comments · Opened Jul 16, 2022
Can't pass parameters to weighted_minkowski distance metric Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

lmcinnes/pynndescent#193 · 3 comments · Opened Jun 30, 2022
Distributed PyNNDescent Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

lmcinnes/pynndescent#191 · 1 comment · Opened Jun 23, 2022
nested loop sequential or parallelization runtime Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

lmcinnes/pynndescent#188 · 1 comment · Opened Jun 3, 2022
Related project: numba-kdtree Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

lmcinnes/pynndescent#179 · 1 comment · 1 reaction · Opened May 7, 2022
Cannot use random projection trees Open

bug

lmcinnes/pynndescent#178 · 8 comments · 1 assignee · Opened Apr 21, 2022
scipy 1.8.0 causes: ValueError: Unknown Distance Metric: wminkowski in test suite Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

lmcinnes/pynndescent#177 · 1 comment · Opened Apr 18, 2022
AttributeError: 'NNDescent' object has no attribute 'parallel_batch_queries' Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

lmcinnes/pynndescent#176 · 1 comment · Opened Apr 1, 2022
Is it possible to speed up index generation for time series data? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#174 · 1 comment · Opened Feb 21, 2022
NNDescent.update() fails even for compressed or uncompressed indexes Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

lmcinnes/pynndescent#173 · 1 comment · Opened Feb 18, 2022
Question about simple RP-Tree experiment in document Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#167 · Opened Jan 21, 2022
[BUG] Error out when using 'cosine' distance metrics (ufunc 'correct_alternative_cosine' did not contain a loop with signature matching types) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#163 · 10 comments · Opened Jan 6, 2022
pynndescent is changing the input data, is this expecte? Open

bug

lmcinnes/pynndescent#157 · 7 comments · 1 assignee · Opened Dec 10, 2021
Import fails Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

lmcinnes/pynndescent#150 · Opened Nov 11, 2021
Nearest neighbors for a subset of points Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#148 · 3 comments · Opened Oct 22, 2021
DistributionNotFound: The 'pynndescent' distribution was not found and is required by the application Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

lmcinnes/pynndescent#144 · 7 comments · Opened Sep 27, 2021
Segfault with n_jobs > 17 during indexing Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

lmcinnes/pynndescent#142 · Opened Sep 23, 2021
sklearn-intelex integration? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#140 · 1 comment · Opened Sep 21, 2021
PyNNDescent on GPU Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

lmcinnes/pynndescent#136 · 8 comments · 2 reactions · Opened Aug 17, 2021
Questions about problems in ingest related to pynndescent Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

lmcinnes/pynndescent#133 · 12 comments · 1 reaction · Opened Jul 24, 2021
Segfaults on mips64el, s390x Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

lmcinnes/pynndescent#128 · Opened Jul 4, 2021
Infinite Euclidean distances when random seed is unlucky number 13 Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

lmcinnes/pynndescent#125 · 4 comments · 1 reaction · Opened Jun 22, 2021
Using Custom Distance Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

lmcinnes/pynndescent#123 · 3 comments · Opened May 21, 2021

lmcinnes/pynndescent

Get new issues in your inbox