pyca | general Python Cellular Automata with multi-dimensions
kandi X-RAY | pyca Summary
kandi X-RAY | pyca Summary
Cellular Automata, CA, in Python.
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Top functions reviewed by kandi - BETA
- Return the minor note of x
- Returns the major penta
- Return the major
- Return the chroma at x
- Execute the universe
- Process the snapshot
- Get the nearest neighbour of a snapshot
- Generate classic rule
- Plot a 1D universe
- Compute the form matrix
- Generate an animation of a universe
- Form the step matrix
- Register a cell type
- Generate an animation
- Plot a single universe
pyca Key Features
pyca Examples and Code Snippets
from pyca.universe1d import Universe1D
from pyca.rules.Rules import Rule30
from pyca.observer import plot1d_universe
universe = Universe1D(300)
universe.register_cell_type(Rule30, 'random', prob=0.5)
universe.initialize()
universe.compute(300)
plot1
Community Discussions
Trending Discussions on pyca
QUESTION
As part of implementing the PKCS #1 v1.5 padding scheme for RSA, I need to generate an octet string of length n consisting of pseudo-randomly generated nonzero octets. I'm looking for the best way to do this using Python.
This is what my current implementation looks like:
...ANSWER
Answered 2022-Jan-30 at 02:50You didn't define what "best" means to you. I'd go with this, which is basically a less wordy way of doing what you already did:
QUESTION
I am trying to create a model using pycaret just as:
...ANSWER
Answered 2021-Sep-23 at 08:38You mentioned my previous question here.
I just faced the same issue as you on Colab. It is 100% issue with libraries.
Initially, I got the error for SMOTE
:
- `AttributeError: 'SMOTE' object has no attribute '_validate_data'
After installing/reinstalling libraries I got exactly your error.
How did I resolve it?
- Started to run Colab and imported all common libraries (
pd
,np
,scikit
, etc). - Installed PyCaret via
pip install
. Thenimport pycaret
andfrom pycaret.classification import *
- Colab reacted: you have issues with
scipy
,sklearn
,lightgbm
, please restart your runtime. - Restarted my runtime on Colab
- Imported all libraries again as I did in step 1
- Ran
import pycaret
andfrom pycaret.classification import *
only
My final code:
QUESTION
This question is the inverse of the existing one here: Encrypt in python 3.7 and decode in NODEJS 12 .
I would prefer to use the exact equivalent of tweet-nacl on python but that project says it is old and not recommended https://github.com/warner/python-tweetnacl . Their recommended replacement is https://github.com/pyca/pynacl : but that one is an interface to libsodium not tweet-nacl and there is no clear documentation on how to achieve the decryption.
Here is the JS encryption:
...ANSWER
Answered 2021-Sep-19 at 10:02SecretBox
and thus the PyNaCl example you posted is for symmetric encryption, s. here. You can find the documentation for public key encryption with PyNaCl here and for PyNaCl in general here.
In the following example, a plaintext is encrypted with TweetNaCl.js and decrypted with PyNaCl.
JavaScript side - Encryption with TweetNaCl.js:QUESTION
I'm using Flask and the Cryptography package to receive a .csv file from the user, encrypt it, store it in the MySQL Database and then, retrieving and decrypting it.
Once I get the file uploaded from the user I do the following to encrypt it:
...ANSWER
Answered 2021-Jul-17 at 22:33I just found out that the problem was in the MySQL Datatype.
BLOB: Can handle up to 65,535 bytes of data.
MEDIUMBLOB: The maximum length supported is 16,777,215 bytes.
Changing the datatype to MEDIUMBLOB in my DB makes everything work ok.
This is how I am decrypting encrypted_bytes_database
and reading this .csv file as a pandas df.
QUESTION
I want implement a elliptic curve diffie hellman using HKDF as key derivation function. I am using a python backend and (vanilla) javascript in frontend. I am using python cryptography library in backend and Web Crypto api in frontend as cryptographic library. I created ECDH key pair in both side and exchanged the pbulic keys. Now I am trying to create the AES shared key with the exchanged public key and private key along with HKDF algorithm. I am able to do it in the python backend (I followed this example for the python code):
...ANSWER
Answered 2021-Jun-13 at 11:02The referenced Python code uses P-384 (aka secp384r1) as elliptic curve. This is compatible with the WebCrypto API, which supports three curves P-256 (aka secp256r1), P-384 and P-521 (aka secp521r1), see EcKeyImportParams
.
The following WebCrypto code generates a shared secret using ECDH and derives an AES key from the shared secret using HKDF. In detail the following happens:
- To allow comparison of the derived key with that of the referenced Python code, predefined EC keys are applied. The private key is imported as PKCS#8, the public key as X.509/SPKI. Note that due to a Firefox bug concerning the import of EC keys, the script below cannot be run in the Firefox browser.
- After the import the shared secret is created with ECDH using
deriveBits()
(and notderiveKey()
). - The shared secret is imported with
importKey()
and then the AES key is derived using HKDF, again withderiveBits()
.
QUESTION
While trying to compile amazon-kinesis-video-stream-producer-sdk-cpp Repo, I encountered with the dependencies saying that the file path was too long.
...ANSWER
Answered 2020-Sep-28 at 06:21I think it's about your git configuration. Try to modify git to support long path
QUESTION
I want to verify a signature of some payload, given a public ECDSA key, and I know beforehand that the signature is correct. I want to use the cryptography python library, but the problem being, I can't make the verification work and always get a InvalidSignature
exception, even though the signature should be correct.
Here the code snippet I'm currently using. The public key is base64 encoded and in DER format (so no ---BEGIN PUBLIC KEY ---
etc.) and the signature is base64 encoded as well. The message is some JSON data as a string, with no spaces.
ANSWER
Answered 2020-Apr-01 at 15:35The signature format that you provided isn't suitable for OpenSSL. OpenSSL's error can be extracted by augmenting the cryptography method that is called when OpenSSL throws an error:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install pyca
You can use pyca like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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