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wtf is pyjavu?

doganulus/pyjavu — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2018-02-15

PythonAudience · dataComplexity · 3/5DormantSetup · moderate

TL;DR

A pattern-matching tool for spreadsheet-style data that lets you write simple patterns to find sequences and relationships across rows, instead of writing complex queries.

Mindmap

mindmap
  root((pyjavu))
    Inputs
      Tabular datasets
      Pattern expressions
      Custom helper functions
    Outputs
      Matched row markers
      Detected sequences
    Use Cases
      Security log analysis
      Workflow order checks
      Data flow detection
    Tech Stack
      Python
      Binary decision diagrams

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Scan security logs for suspicious sequences of events across columns.

REASON 2

Check whether a workflow's steps executed in the correct order.

REASON 3

Detect when a value in one column later reappears in another, signaling data flow.

REASON 4

Write custom helper functions to filter or transform values before pattern matching.

What's in the stack?

Python

How it stacks up

doganulus/pyjavu0xallam/my-recipe0xhassaan/nn-from-scratch
Stars——0
LanguagePythonPythonPython
Last pushed2018-02-152022-11-22—
MaintenanceDormantDormant—
Setup difficultymoderatemoderatemoderate
Complexity3/52/54/5
Audiencedatageneraldeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 1h+

Described as an incomplete 'testbed' implementation of DejaVu, not a full-featured production tool.

License is not stated in the available content.

Yoink these prompts

Prompt 1
Help me write a PyJavu pattern that finds rows where value X in column A is followed by value Y in column B.
Prompt 2
Show me how to use PyJavu's 'or' and 'then' operators to combine two patterns into one query.
Prompt 3
Walk me through writing a custom helper function in PyJavu to ignore certain column values before matching.
Prompt 4
Explain how PyJavu's repeat operators (asterisk and plus) work when searching for recurring patterns.
Prompt 5
Help me adapt a PyJavu pattern to detect a suspicious login sequence in a security log dataset.

Frequently asked questions

wtf is pyjavu?

A pattern-matching tool for spreadsheet-style data that lets you write simple patterns to find sequences and relationships across rows, instead of writing complex queries.

What language is pyjavu written in?

Mainly Python. The stack also includes Python.

Is pyjavu actively maintained?

Dormant — no commits in 2+ years (last push 2018-02-15).

What license does pyjavu use?

License is not stated in the available content.

How hard is pyjavu to set up?

Setup difficulty is rated moderate, with roughly 1h+ to a first successful run.

Who is pyjavu for?

Mainly data.

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