NetworkX
aoc2022
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NetworkX | aoc2022 | |
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61 | 10 | |
14,153 | 2 | |
1.4% | - | |
9.6 | 5.2 | |
1 day ago | 4 months ago | |
Python | Rust | |
GNU General Public License v3.0 or later | GNU Affero General Public License v3.0 |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
NetworkX
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Routes to LANL from 186 sites on the Internet
Built from this data... https://github.com/networkx/networkx/blob/main/examples/grap...
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The Hunt for the Missing Data Type
I think one of the elements that author is missing here is that graphs are sparse matrices, and thus can be expressed with Linear Algebra. They mention adjacency matrices, but not sparse adjacency matrices, or incidence matrices (which can express muti and hypergraphs).
Linear Algebra is how almost all academic graph theory is expressed, and large chunks of machine learning and AI research are expressed in this language as well. There was recent thread here about PageRank and how it's really an eigenvector problem over a matrix, and the reality is, all graphs are matrices, they're typically sparse ones.
One question you might ask is, why would I do this? Why not just write my graph algorithms as a function that traverses nodes and edges? And one of the big answers is, parallelism. How are you going to do it? Fork a thread at each edge? Use a thread pool? What if you want to do it on CUDA too? Now you have many problems. How do you know how to efficiently schedule work? By treating graph traversal as a matrix multiplication, you just say Ax = b, and let the library figure it out on the specific hardware you want to target.
Here for example is a recent question on the NetworkX repo for how to find the boundary of a triangular mesh, it's one single line of GraphBLAS if you consider the graph as a matrix:
https://github.com/networkx/networkx/discussions/7326
This brings a very powerful language to the table, Linear Algebra. A language spoken by every scientist, engineer, mathematician and researcher on the planet. By treating graphs like matrices graph algorithms become expressible as mathematical formulas. For example, neural networks are graphs of adjacent layers, and the operation used to traverse from layer to layer is matrix multiplication. This generalizes to all matrices.
There is a lot of very new and powerful research and development going on around sparse graphs with linear algebra in the GraphBLAS API standard, and it's best reference implementation, SuiteSparse:GraphBLAS:
https://github.com/DrTimothyAldenDavis/GraphBLAS
SuiteSparse provides a highly optimized, parallel and CPU/GPU supported sparse Matrix Multiplication. This is relevant because traversing graph edges IS matrix multiplication when you realize that graphs are matrices.
Recently NetworkX has grown the ability to have different "graph engine" backends, and one of the first to be developed uses the python-graphblas library that binds to SuiteSparse. I'm not a directly contributor to that particular work but as I understand it there has been great results.
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Build the dependency graph of your BigQuery pipelines at no cost: a Python implementation
In the project we used Python lib networkx and a DiGraph object (Direct Graph). To detect a table reference in a Query, we use sqlglot, a SQL parser (among other things) that works well with Bigquery.
- NetworkX โ Network Analysis in Python
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Custom libraries and utility tools for challenges
If you program in Python, can use NetworkX for that. But it's probably a good idea to implement the basic algorithms yourself at least one time.
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Google open-sources their graph mining library
For those wanting to play with graphs and ML I was browsing the arangodb docs recently and I saw that it includes integrations to various graph libraries and machine learning frameworks [1]. I also saw a few jupyter notebooks dealing with machine learning from graphs [2].
Integrations include:
* NetworkX -- https://networkx.org/
* DeepGraphLibrary -- https://www.dgl.ai/
* cuGraph (Rapids.ai Graph) -- https://docs.rapids.ai/api/cugraph/stable/
* PyG (PyTorch Geometric) -- https://pytorch-geometric.readthedocs.io/en/latest/
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1: https://docs.arangodb.com/3.11/data-science/adapters/
2: https://github.com/arangodb/interactive_tutorials#machine-le...
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org-roam-pygraph: Build a graph of your org-roam collection for use in Python
org-roam-ui is a great interactive visualization tool, but its main use is visualization. The hope of this library is that it could be part of a larger graph analysis pipeline. The demo provides an example graph visualization, but what you choose to do with the resulting graph certainly isn't limited to that. See for example networkx.
aoc2022
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[2022 Day 15] today is the day
Mine is taking ~115ms on my 9 years old i5-3340M :D
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-๐- 2022 Day 15 Solutions -๐-
Rust - just collect in range intervals per line. Sum of lengths is basically p1 and p2 is just a loop over rows looking for one with more than one interval. Total runtime for both parts is ~650ms. twitch, youtube.
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-๐- 2022 Day 13 Solutions -๐-
Rust. Obs crashed and I didn't notice it until the end so here are partial recordings: twitch, youtube.
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-๐- 2022 Day 12 Solutions -๐-
It's 'cheating' only in the sens that I wanted to measure real i/o so it would be cheating in my case. And funnily enough I had a bug there that I just fixed :D
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[2022 Day11 (Part2)] [python] brute force
My real solution runs in 19ms and is here. The one with BigUint is on a branch here.
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-๐- 2022 Day 11 Solutions -๐-
Simple rust solution that solves both parts with same function. Recordings twitch and youtube.
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-๐- 2022 Day 9 Solutions -๐-
Rust / Recording
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-๐- 2022 Day 8 Solutions -๐-
Rust with runtime ~450ยตs
What are some alternatives?
Numba - NumPy aware dynamic Python compiler using LLVM
adventofcode - Python solutions to Advent of Code puzzles, https://adventofcode.com/
Dask - Parallel computing with task scheduling
adventofcode
julia - The Julia Programming Language
aocaml - AoC in OCaml, for maximum typing pleasure
RDKit - The official sources for the RDKit library
aoc2022
snap - Stanford Network Analysis Platform (SNAP) is a general purpose network analysis and graph mining library.
aoc-2022 - Solutions to the Advent of Code 2022, just for fun ๐
SymPy - A computer algebra system written in pure Python
aoc-2022 - Code for Advent of Code 2022