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thealgorithms / python

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Understand thealgorithms/python's source layout and find a starting point for your task using the saved repository evidence.

A
Architecture grade
score 100/100
0
Import cycles
lower is better
400
Modules parsed
29 edges
100%
Layeredness
clean-layer ratio

Measured from the parsed import graph, retained from the earlier analysis. Coupling, not a reading order.

How the code fits together

AI
  • Algorithm ImplementationsIndividual algorithm Python modules with docstrings, examples, and time/space complexity annotations.
  • Category Documentation & InitREADME and __init__.py files providing category overviews and module exports.

Files at 3935d286dfa3 · descriptions are AI-written.

The descriptions and the file list come from different revisions. Check responsibilities against source.

Where to start reading

  1. Repository root
  2. Repository root
  3. Public API candidatename match
  4. Public API candidatename match
  5. Suggested starting pointAI
  6. Suggested starting pointAI
  7. Suggested starting pointAI
  8. Suggested starting pointAI

Find files for a task

AI

Add a New Algorithm to an Existing Category

Suggested by the saved analysis. Some step paths were not captured or refer to generated or vendor files; only observed source files are linked.

  • Update the category's __init__.py to export the new algorithm function
  • Add entry to DIRECTORY.md with algorithm name and brief description
  • Submit pull request following guidelines in CONTRIBUTING.md

Create a New Algorithm Category

Suggested by the saved analysis. Some step paths were not captured or refer to generated or vendor files; only observed source files are linked.

  • Update top-level DIRECTORY.md to list the new category and its algorithms

Contribute an Algorithm Implementation

Suggested by the saved analysis. Some step paths were not captured or refer to generated or vendor files; only observed source files are linked.

  • Fork the repository and create a feature branch from master
  • Ensure code follows repository style guide and passes linting
  • Submit pull request with clear description referencing CONTRIBUTING.md standards

Change the public API

Start with possible export surfaces, then check their consumers and tests. These suggestions use file names, not verified execution paths.

  • File-name match for this task.
  • File-name match for this task.
  • File-name match for this task.

Add or update tests

Use a nearby test as a pattern. Read the root manifest or contribution guide for the correct test command. These suggestions use file names, not verified execution paths.

  • File-name match for this task.
  • File-name match for this task.
  • File-name match for this task.

Change build or automation

Inspect the relevant configuration and the commands it runs before changing the workflow. These suggestions use file names, not verified execution paths.

  • File-name match for this task.
  • File-name match for this task.
  • File-name match for this task.

File paths come from a snapshot of up to 500 captured paths; an omitted file may still exist.

  • Public and runtime candidates are based on file names; their exports and execution paths still need checking in source.
  • The file list was refreshed after the written analysis. Subsystem descriptions and suggested changes may describe an older revision.

Import graph details

Modules (9)

Source directories grouped from the import graph. Each links to a per-module page with its files and how it couples to the rest.

Also: digital_image_processing/edge_detection

Architecture and request flow

Critical modules — by import-graph evidence

Import graph
400 files parsed · 29 internal edges

A file is "critical" when lots of other files in the repo import it. The list is sorted by how many files import each one; the top of the list is the most load-bearing. A flame icon means the file is also one of the most-edited recently — when a critical file changes a lot, bugs there ripple wider, so it's where regressions are most likely.

How the A grade breaks down

Imports flow one direction100%
40/40

What fraction of imports go from application code (likely to change) toward foundation code (more stable). High % means the codebase has clean layers — like a pyramid, not a hairball. Healthy repos are above 85%.

Foundation vs application separationspread = 0.47
30/30

Measures how distinct foundation files (rarely change, lots of files depend on them) are from application files (change often, depend on lots of things). A wider spread (higher σ) means clearer layers; a narrow spread means everything's tangled together at roughly the same level.

No circular imports0 cycles
30/30

A 'cycle' is when file A imports B which imports A again (possibly via more files in between). Cycles make builds slower, refactors harder, and tests trickier. −5 points per cycle found.

List — top 12 most-imported files

Architecture evolution

See how the import graph changed in the last 90 days — grade shift, cycles added/removed, top-file rotation. Heavy compute (~30s on first load), cached for 30 days after.

Possibly-unused modules (15)

Import graph

Nothing else in the repo imports these files, and they don't look like entry points — so they may be dead code. Verify before removing: dynamic imports, re-exports, and framework auto-loading (Next.js routes, plugin/DI registries) aren't tracked by the import graph.

Request flow

Technology choices

Python 3.x

Platform-agnostic, readable syntax ideal for educational algorithm documentation and implementation across disciplines.

Pure Python (minimal dependencies)

Ensures algorithms are portable, focused on logic rather than framework overhead, and can run in any Python environment.

Docstrings and type hints

Provides in-code documentation, complexity analysis, and type clarity without external documentation tools.

GitHub-based workflow

Enables distributed contribution, version control, CI/CD integration, and community-driven code review.

Build time and runtime

Build-time

  • ▸
    Linting & style validation — Tools verify PEP 8 compliance and code quality (referenced in CONTRIBUTING.md)
  • ▸
    Documentation generation — DIRECTORY.md acts as static index; no build-time doc generation observed

Runtime

  • ▸
    Python interpreter — Pure Python execution; requires Python 3.x installed locally
  • ▸
    Algorithm execution — Individual .py modules run standalone or imported as functions; no server or framework required

Design trade-offs

Single repository containing all algorithm categories rather than per-domain packages

Simplifies discovery and encourages cross-domain learning without dependency management complexity.

Repository size grows; requires clear directory structure (DIRECTORY.md) to remain navigable.

Educational implementations prioritized over production optimization

Target audience is learners and students; readability and explanation clarity are primary goals.

Some algorithms may not be optimal for production systems; users must adapt for performance-critical use.

Minimal external dependencies

Reduces installation friction and platform-specific compatibility issues for beginners.

Some advanced algorithms must re-implement utility functions rather than relying on specialized libraries.

Non-goals

  • ✗High-performance production system for computation-intensive tasks
  • ✗Real-time data processing or streaming applications
  • ✗Package distribution via PyPI as a library dependency
  • ✗Full cryptographic security certifications (ciphers are educational, not for securing sensitive data)
  • ✗Native compilation or C/C++ interop for speed optimization

Code quality and hotspots

Quality Score: 80/100

Low Risk

This repo is in good health with CI, tests, and active maintenance.

High complexity -10Multiple anti-patterns -10

Maintainability grade

Static analysis

How maintainable the code looks — from complexity, code issues, test presence, file size, and hotspot load. It grades the shape of the code, not defect risk, and doesn't replace review.

B
76/100
A ≥ 85, B ≥ 70, C ≥ 55, D ≥ 40, F < 40
Cyclomatic complexityavg 16
22/35
Code issues0 errors, 8 warnings
17/20
Testspresent · ~2% of files
14/20
Largest file717 lines
13/15
Hotspot load0 high-risk files
10/10

Configuration status

CI/CD Pipeline — configured

Provider: GitHub Actions

8 GitHub Actions workflows

Test Suite — detected

36 test files detected

Stack: Pytest

Where: graphs/tests · maths · geometry/tests

Test Coverage — ~2%heuristic

36 test files / 1,571 source files. This is a file-count ratio, not real line coverage — set up Codecov for authoritative numbers.

Dependency Scanning — no config detected

No Dependabot / Renovate / Snyk / Trivy / CodeQL config found. Enable Dependabot or Renovate.

Live Signals

Real-time data from Codecov, GitHub Actions, GitHub Issues, deps.dev — not estimates.

CI pass rate98%

last 50 runs · median 20s

Stale-issue ratio0%

of 2 recent open issues are 30d+ old with no replies

Maintainer response19m

median first-reply across 15 recent issues · fast

Top hotspots

Files edited often AND hard to reason about. Churn = recent commit frequency, Complexity = branches and nesting, Risk = both combined. These are the highest-leverage targets for refactoring or testing.

divide_and_conquer/convex_hull.py
Churn: 16 (4 commits/180d)Complexity: 54Risk: 9
digital_image_processing/index_calculation.py
Churn: 8 (2 commits/180d)Complexity: 100Risk: 8

All hotspots

Files that change often and are complex tend to accumulate more bugs

AI-suggested anti-patterns

AI · unverified

Pattern-matches from the file structure and dependencies — useful as hypotheses, but not grounded in actual source. For real findings see Code Scanning above.

Inconsistent docstring format

Medium

Some algorithms use triple-quoted docstrings with complexity notation; others lack formal documentation.

backtracking/, bit_manipulation/, ciphers/ (varying docstring styles across files)

No input validation in algorithm implementations

Low

Educational algorithms assume valid input; no defensive checks for edge cases, which could mislead learners.

backtracking/n_queens.py, bit_manipulation/count_1s_brian_kernighan_method.py

Potential code duplication across similar algorithms

Low

Similar problems solved with similar patterns (e.g., all_permutations.py vs. all_combinations.py) without shared utilities.

backtracking/ (e.g., multiple permutation/combination variants)

AI-suggested bottlenecks

AI · unverified

Speculation from file structure, not profiling data. Validate against real metrics before acting on these.

Process/scalability Bottleneck

Manual index maintenance; adding/removing algorithms requires hand-edits; scales poorly as repository grows.

DIRECTORY.md

Human review / CI gaps Bottleneck

Subjective code quality checks and maintainer availability; no automated formatting rules reduce back-and-forth.

Contributor review cycle (CONTRIBUTING.md)

Navigation/UX Bottleneck

No centralized categorization or algorithm search feature (beyond DIRECTORY.md); relies on repository navigation.

Category discovery for newcomers

Code metrics

Static analysis on sampled source files (up to 15 files).

Avg Cyclomatic Complexity16

Counts if/for/while/switch/catch/ternary branches

Errors / Warnings0 / 8

Secrets, empty catches, console.log, var usage, long lines

Largest File Analyzed717 lines
data_structures/binary_tree/red_black_tree.py