pydata/patsy

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Describing statistical models in Python using symbolic formulas

Stars: 990
Forks: 106
Open beginner issues: 0
Indexed issues: 67
Avg merge: 7d 34m
Merged PRs (30d): 1

Dominant language: Python
License: No license data
Last GitHub push: Sep 7, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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67 open issues indexed

Add an over-parametrized dummy coding scheme Open

statsmodels-request well-defined-task-definitely-do-this

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

pydata/patsy#60 · 3 comments · Opened Apr 14, 2015
Tests fail with latest Pandas (0.15.2) Open

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

pydata/patsy#54 · Opened Feb 17, 2015
Sparse matrix from formula Open

fixed in formulaic

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

pydata/patsy#46 · 11 comments · 4 reactions · Opened Jun 19, 2014
Categorical names (again) Open

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

pydata/patsy#40 · 4 comments · Opened May 6, 2014
Categorical does not work with nan Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

pydata/patsy#36 · 14 comments · 2 reactions · Opened Mar 18, 2014
how to deal with unicode? Open

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

pydata/patsy#34 · 8 comments · Opened Feb 17, 2014
Less awkward API for using simple stateful transforms? Open

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

pydata/patsy#31 · Opened Oct 30, 2013
DesignMatrix should have to_dataframe() method Open

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

pydata/patsy#30 · 5 comments · Opened Oct 30, 2013
Better contrast specification Open

enhancement

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

pydata/patsy#29 · Opened Oct 26, 2013
Preserving column order for categoricals Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

pydata/patsy#27 · 3 comments · Opened Oct 9, 2013
Make DesignMatrixBuilders pickleable and saveable Open

fixed in formulaic

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

pydata/patsy#26 · 24 comments · Opened Oct 6, 2013
Rigorously handle 0d/1d interaction in factor values Open

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

pydata/patsy#24 · Opened Sep 29, 2013
Simpler term names Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

pydata/patsy#19 · 6 comments · Opened May 24, 2013
Maximum recursion depth error for formulas with more than 485 terms Open

fixed in formulaic

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

pydata/patsy#18 · 14 comments · Opened Apr 12, 2013
Patsy prints uninformative error message when user places "Intercept" in a formula Open

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

pydata/patsy#14 · 1 comment · Opened Feb 4, 2013
Trouble making categorical variable --- TypeError: 'ClassRegistry' object is not callable Open

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

pydata/patsy#13 · 4 comments · Opened Jan 9, 2013
Feature request: "target ~ ." syntax Open

well-defined-task-definitely-do-this

Difficulty 4/5 3-5 days Newbie friendliness 42/100

pydata/patsy#10 · 38 comments · 66 reactions · Opened Oct 29, 2012

pydata/patsy

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