Physics

POPPY: Physical Optics Propagation in Python

POPPY (Physical Optics Propagation in Python) is a Python package that simulates physical optical propagation including diffraction. It implements a flexible framework for modeling Fraunhofer and Fresnel diffraction and point spread function formation, particularly in the context of astronomical telescopes. POPPY was developed as part of a simulation package for the James Webb Space Telescope, but is more broadly applicable to many kinds of imaging simulations. It is not, however, a substitute for high fidelity optical design software such as […]

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Security

Keep your company’s passwords behind the firewall

TeamVault TeamVault is an open-source web-based shared password manager for behind-the-firewall installation. It requires Python 3.3+ and Postgres (with the unaccent extension). Installation apt-get install libffi-dev libldap2-dev libpq-dev libsasl2-dev python3.6-dev postgresql-contrib pip install teamvault teamvault setup vim /etc/teamvault.conf # note that the teamvault database user will need SUPERUSER privileges # during this step in order to activate the unaccent extension teamvault upgrade teamvault plumbing createsuperuser teamvault run Update pip install –upgrade teamvault teamvault upgrade Development Install Postgres and create a […]

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Julia

Python and Julia in harmony

Bringing Python® and Julia together in seamless harmony: Call Python code from Julia and Julia code from Python via a symmetric interface. Simple syntax, so the Python code looks like Python and the Julia code looks like Julia. Intuitive and flexible conversions between Julia and Python: anything can be converted, you are in control. Fast non-copying conversion of numeric arrays in either direction: modify Python arrays (e.g. bytes, array.array, numpy.ndarray) from Julia or Julia arrays from Python. Helpful wrappers: interpret […]

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Simulation

Python / C++ based particle reaction-diffusion simulator

ReaDDy ReaDDy (Reaction Diffusion Dynamics) is an open source particle based reaction-diffusion simulator that can be configured and run via Python.Currently supported platforms are Mac and Linux. The preferred way of installing the software is by using the conda package manager: # add conda-forge channel conda config –add channels conda-forge # optional: create environment for readdy, switch to that environment conda create -n readdy python=3 source activate readdy # install readdy conda install -c readdy readdy A documentation and a […]

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COPASI

A simplified python interface to COPASI

BasiCO This project hosts a simplified python interface to COPASI. While all functionality from COPASI is exposed via automatically generated SWIG wrappers, this package aims to add a layer on top of that, to hide most of the complexity away when calling COPASI functions. Installation The package works with python 2.x and python 3.x, provided the following packages are installed: pandas and python-copasi are freely available on pypi. Once done, just have the basico directory in the PYTHONPATH or sys.path. […]

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Command-line Tools

A tracking logs processor to feed your LRS

Ralph Ralph is a command-line tool to fetch, extract, convert and push your tracking logs (aka learning events) from various storage backends to your LRS or any other compatible storage or database backend. Quick start guide Ralph is distributed as a standard python package; it can be installed via pip or any other python package manager (e.g Poetry, Pipenv, etc.): $ pip install ralph-malph Once installed, the ralph command should be available in your PATH. Try to invoke the program […]

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Command-line Tools

A cli Linux and Windows Nopaystation client made with python and wget

pyNPS pyNPS – A cli Linux and Windows Nopaystation client made with python 3 and wget PyNPS is a Nopaystation client writen in python 3 that, with the help of wget and pkg2zip, can search, download and decrypt/extract PSVita, PSP, PSX, PSM and PS3 games from Nopaystation database. It’s basically a command line version of NPSBrowser writen by a moron (aka me). There are tree methods you can install pyNPS: Using PIP This is for both 32 and 64bits systems. […]

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Python

Python’s deque: Implement Efficient Queues and Stacks

If you often work with lists in Python, then you probably know that they don’t perform fast enough when you need to pop and append items on their left end. Python’s collections module provides a class called deque that’s specially designed to provide fast and memory-efficient ways to append and pop item from both ends of the underlying data structure. Python’s deque is a low-level and highly optimized double-ended queue that’s useful for implementing elegant, efficient, and Pythonic queues and […]

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Segmentation

A Comprehensive Analysis of Weakly-Supervised Semantic Segmentation

The code of: A Comprehensive Analysis of Weakly-Supervised Semantic Segmentation in Different Image Domains, arXiv pre-print 2019 paper. Introduction We conduct the first comprehensive analysis of Weakly-Supervised Semantic Segmentation (WSSS) with image label supervision in different image domains. WSSS has been almost exclusively evaluated on PASCAL VOC2012 but little work has been done on applying to different image domains, such as histopathology and satellite images. The paper analyzes the compatibility of different methods for representative datasets and presents principles for […]

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Neural Network

Truly shift-invariant convolutional neural networks

Authors: Anadi Chaman and Ivan Dokmanić Convolutional neural networks were always assumed to be shift invariant, until recently when it was shown that the classification accuracy of a trained CNN can take a serious hit with merely a 1-pixel shift in input image. One of the primary reasons for this problem is the use of downsampling (popularly known as stride) layers in the networks. In this work, we present Adaptive Polyphase Sampling (APS), an easy-to-implement non-linear downsampling scheme that completely […]

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