Convert a collection of features to a fixed-dimensional matrix using the hashing trick.

Last update: Mar 15, 2022

Overview

FeatureHasher

Convert a collection of features to a fixed-dimensional matrix using the hashing trick.

Note, this requires Jina>=2.2.4.

Example

Here I use FeatureHasher to hash each sentence of Pride and Prejudice into a 128-dim vector, and then use .match to find top-K similar sentences.

from jina import Document, DocumentArray, Flow

# load 
   
d = Document(uri='https://www.gutenberg.org/files/1342/1342-0.txt').convert_uri_to_text()

# cut into non-empty sentences store in a DA
da = DocumentArray(Document(text=s.strip()) for s in d.text.split('\n') if s.strip())

# use FeatureHasher in a Flow
f = Flow().add(uses='jinahub://FeatureHasher')

embed_da = DocumentArray()
with f:
    f.post('/', da, on_done=lambda req: embed_da.extend(req.docs), show_progress=True)

print('self-matching...')
embed_da.match(embed_da, exclude_self=True, limit=5, normalization=(1, 0))
print('total sentences: ', len(embed_da))
for d in embed_da:
    print(d.text)
    for m in d.matches:
        print(m.scores['cosine'], m.text)
    input()

           [email protected][I]:🎉 Flow is ready to use!
	🔗 Protocol: 		GRPC
	🏠 Local access:	0.0.0.0:52628
	🔒 Private network:	192.168.178.31:52628
	🌐 Public address:	217.70.138.123:52628
⠹       DONE ━╸━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0:00:01 100% ETA: 0 seconds 40 steps done in 1 second
total sentences:  12153
The Project Gutenberg eBook of Pride and Prejudice, by Jane Austen

   
     *** END OF THE PROJECT GUTENBERG EBOOK PRIDE AND PREJUDICE ***

    
      *** START OF THE PROJECT GUTENBERG EBOOK PRIDE AND PREJUDICE ***

     
       production, promotion and distribution of Project Gutenberg-tm

      
        Pride and Prejudice

       
         By Jane Austen This eBook is for the use of anyone anywhere in the United States and 
        
          This eBook is for the use of anyone anywhere in the United States and 
         
           by the awkwardness of the application, and at length wholly 
          
            Elizabeth passed the chief of the night in her sister’s room, and 
           
             the happiest memories in the world. Nothing of the past was 
            
              charities and charitable donations in all 50 states of the United

In practice, you can implement matching and storing via an indexer inside Flow. This example is only for demo purpose so any non-feature hashing related ops are implemented outside the Flow to avoid distraction.

Convert a collection of features to a fixed-dimensional matrix using the hashing trick.

Related tags

Overview

FeatureHasher

Example

Owner

Jina AI

Script hecho en python para sacar la informacion del numero de telefono, Hecha con el API de numverify

Metasploit Multi Purpose Exploiting Toolkit For Termux

An easy-to-use wrapper for NTFS-3G on macOS

Using python 3 and Flask an MVC system where the AES 128 CBC and Trivium algorithms

These are Simple python scripts to test/scan your network

Lightweight and beneficial Dependency Injection plugin for apscheduler

pwncat module that automatically exploits CVE-2021-4034 (pwnkit)

A python script written for lazy people to hack their school systen ;D

Yesitsme - Simple OSINT script to find Instagram profiles by name and e-mail/phone

spring-cloud-gateway-rce CVE-2022-22947

ProxyLogon(CVE-2021-26855+CVE-2021-27065) Exchange Server RCE(SSRF->GetWebShell)

macOS Initial Access Payload Generator

Python tool for enumerating directories and for fuzzing

neo Tool is great one in binary exploitation topic

Writing and posting code throughout my new journey into python!

Searches through git repositories for high entropy strings and secrets, digging deep into commit history

Hack computer in the form of RAR files from all types of clients, even Linux

It's a simple tool for test vulnerability Apache Path Traversal

Cve-2021-22005-exp

automatically crawl every URL and find cross site scripting (XSS)