Python is a dynamic, high-level language. Its design focuses on clear syntax, an intuitive approach to object-oriented programming, and making the right way to do things obvious. Python supports modules, exceptions, had an extensive standard module library. Python can also be embedded in other ...

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3
votes
1answer
164 views

Draw a Call Graph

I'm maintaining an old code base written in python. In particular there is a complex piece of code that from a module calls other functions from other modules that call other functions and so on. It ...
2
votes
1answer
53 views

Best practices for a daemon that forks and becomes user

I want to write a small daemon in python under Linux that accepts connections and authenticates the user (details for this don't matter) and then forks a child for the connection and becomes the user. ...
2
votes
1answer
340 views

Merge two different API calls into One

I have two different apps in my django project. One is "comment" and an other one is "files". A comment might save some file attached to it. The current way of creating a comment with attachments is ...
1
vote
1answer
478 views

Web application / Domain model integration using JSON capable DTOs

I'm a bit confused about architectural choices for the web-applications/java/python world. For c/c++ world the available (open source) choices to implement web applications is pretty limited to zero, ...
0
votes
1answer
17 views

Optional text qualifier in CSV file as input to SSIS package

I receive several CSV files each quarter to process through an SSIS package, and the formatting is inconsistent. This quarter, I encountered what I term optional text qualifiers--text qualifer of ...
0
votes
1answer
46 views

Should I put the parameters in constructor or in method? (Python 3)

I have the following code: def __init__(self, vocable_file_path, xsd_file_path, word_list_file_path): self.vocable_file_path = vocable_file_path self.xsd_file_path = xsd_file_path ...
0
votes
1answer
46 views

Multiple different versions of similar apps in one project

I need some help to improve the architecture of a site I've built. What I want to achieve within a single Django project is the following: I want a site that comes in several versions (one per ...
0
votes
1answer
56 views

Normalizing a numpy array

I checked a while back for questions relevant to my own about normalizing numpy arrays but couldn't find any. So I'll pose my question following this line of code: for i in ...
0
votes
1answer
54 views

Programming to multiple backends

My current project is a high-level abstraction package for GPIO programming on those nifty little SoC-Computers (Raspberry Pi, Cubieboard, Beaglebone Black, Pandaboard etc.). One of my goals is to ...
0
votes
1answer
69 views

Making API calls with celery

I'm designing a system for a client where the requirements are: they upload a JSON file (one object/line) make a call to an API with the JSON object as the payload record the state (success/failure) ...
0
votes
1answer
115 views

Setting up folders and importing modules in Python

I'm building an app to automate some processes that are annoying to do by hand (looking in a file, taking certain information out of a file, building another file with that information). My project ...
3
votes
0answers
67 views

auto update strategy for a software distributed as a tar ball written in python 2.7 targeting mac osx

This is what I have planned as an auto update strategy for a software that is as a tar ball. The application is running as a system daemon which means it have root privilege. App runs on startup ...
2
votes
0answers
20 views

Structuring a Python Project: Need some guidance

I currently am working on a project that involves several discrete components that have some common functionality, and I am in need of some advice. Right now I have a central component responsible ...
2
votes
0answers
63 views

Method object creation in Python data model

I've been reading the article on the data model of Python on its Reference website, and have been confused about this part: When the attribute is a user-defined method object, a new method ...
2
votes
0answers
413 views

How does the Zope Component Architecture (ZCA) relate to Service Component Architecture (SCA)?

I'm very new to the principle of Service Component Architecture and Zope in general, but the more I look, the more ZCA seems to be a good solution for a certain class of problems I often encounter. I ...
2
votes
0answers
79 views

How should private dependency links be handled in setup.py

At work we use a private pypi server. This pypi server is specified as a dependency link: ... from setuptools import setup config = ConfigParser.ConfigParser() rc = ...
2
votes
0answers
164 views

The inheritance argument of zope.interface (providedby vs isinstance)

What limitations does inheritance of an interface through an abstract base class present that are addressed by zope.interface? In the following talk given in 2010 by Jeff Rush about interfaces, at ...
2
votes
0answers
258 views

Gevent - Make blocking calls non-blocking

I have the blocking code shown below. Is calling monkey.patch_all() enough/optimal to make it non-blocking? Does Gevent handle iterations like these? # front page def front_page(): database = ...
1
vote
0answers
57 views

Is there a better algorithm to distribute integer to X integers minimizing their difference?

Is there a better algorithm to distribute values from one source to X destinations minimizing their difference? I have some source integer. I need to know how much of that value I need to distribute ...
1
vote
0answers
56 views

Could there be a use case for C# style auto-properties in Python

I've been doing a lot of work in C# recently (my primary language is Python) and I love that I can do something like public string MyProperty{ get; set; } Going back to Python I miss that sort of ...
1
vote
0answers
134 views

Calculating uncompressed file size without uncompressing file in zlib

I am writing a python program which parses zip (currently only zlib, using DEFLATE compression) files and verifies the correctness of their headers and data. One of the things I'm trying to achieve is ...
1
vote
0answers
70 views

Code structure with MongoDB in python

I am new to MongoDB and python. I know how to make basic use of pymongo in order to manipulate documents. I am having trouble finding how to create some structure or governance in what gets inside ...
1
vote
0answers
214 views

How to Use Python as a “Macro” runner for a C# Application

I am working on an application that the user may wish to automate some features of (but we don't know what at the moment) I would like to provide them some kind of scripting interface so they can play ...
1
vote
0answers
35 views

Finding the largest bundle of flagged points

I am currently working to develop a program that takes in an array of 4 columns and around 200,000 rows. Each column represents x, y, z (coordinates), and a flag denoting whether or not this point is ...
1
vote
0answers
72 views

Structuring a multi-language project?

I'm working on a project which involves writing code for multiple devices, each in its own language (in particular, Arduino and Python). I want to contain the entire project in a single directory, but ...
1
vote
0answers
58 views

Need to add websocket support to a single page that's running a wsgi service

Current setup. I have a legacy ERP system (Thoroughbred) and i then have several in house applications (CRM, WMS) and a website that interact with it via an xml server and straight ODBC connections. ...
1
vote
0answers
56 views

Improve communication between controller and trackers in a Twitter fetcher tool using RabbitMQ or Apache Flume

I've been working for a time with some researches developing a tool to fetch tweets from Twitter and process them in some way. The first prototype "worked" but became a pain as we used sockets to ...
1
vote
0answers
63 views

Is there a standard practice on making a modular Python script?

I wrote a Python script for PIA here: pia-auto-login.py However, I need to make it more modular so that it does the OpenVPN changes from this script. Then I want to create two more packages (at ...
1
vote
0answers
794 views

Best practices to parse a log file using Python

I'm writing a Python tool to parse a log file from game server. The log file is of format: ms:classname::id::method::arg1::arg2.... There are a lot of classes, and a lot of methods for each class, ...
1
vote
0answers
126 views

The Python module-as-singleton hack

I've seen (and once used) this idiom a few times in Python: # At the end of a module: if __name__ == '__main__': main() # or whatever your entry point looks like, this line isn't important else: ...
1
vote
0answers
264 views

Why does pkg_resources not find bloom in my virtualenv?

I'm trying to hack on the ROS bloom build system (https://github.com/ros-infrastructure/bloom). After I've made some edits, I build it and install it to a virtualenv to test using python setup.py ...
1
vote
0answers
109 views

Inheritance and constricted referencing

Let's say I have BaseA and BaseB classes. BaseB can have to several references of BaseA instances. Now, we have two other classes, DerivedA and DerivedB that respectively inherit from BaseA and BaseB. ...
0
votes
0answers
44 views

Can I listen on a port without interrupting traffic?

I have developed the bare bones on a socket server in Python. I'm trying to capture the HTTP packets going to a web server without blocking them. try: self.socket = ...
0
votes
0answers
24 views

Accessing data in widget

Background I started to get involved in a project written in python and wxPython (for the GUI). My task is to debug and add a few features to the GUI. The widgets are organised mainly with sizers, ...
0
votes
0answers
35 views

Utilizing Python Slate for pdf text extraction from PHP

I want to use Python Slate module for PDF text extraction, and I have my code up and running for this. What I would like to know here is how to link my existing PHP MVC to utilize/make a request to ...
0
votes
0answers
62 views

Will this data mining approach work? Is it a good idea?

I need to extract fields like the document number, date, and invoice amount from a bunch of .csv files, which I believe are referred to as "unstructured text." I have some labeled input files and will ...
0
votes
0answers
22 views

Ipython3 development cycle

I am new to python (python3) and am using Ipython3 while writing the code just in my preferred text editor. I am not yet sure what is a good development cycle as I keep getting problems with reloading ...
0
votes
0answers
28 views

Synchronising a set of data against elasticsearch

So I have a situation where I get in a lot of large XML files and I want that data synchronised on elasticsearch. Current way Have index_1 When data is updated create blank index_2 Load all of ...
0
votes
0answers
67 views

Matching groups of similar lines on a generic matching algorithm

I have to write a program to search through a file containing lines and find lines that match to a degree of tolerance but are not necessarily the same. So for example the following lines would match: ...
0
votes
0answers
51 views

Is Python Logging in a WSGI application a best practice a production environment?

I am trying to log my webpage access to a database. It is a requirement. It seems to be a difficult thing to do outside of Windows IIS, and I do not wish to use Python with IIS. My options seem to ...
0
votes
0answers
52 views

Extending the interface of existing (python) classes

I use a library with an existing well-defined interface, that I have extended for my purposes. I.e. most classes in that library inherit of one abstract base class class Parent(object): def ...
0
votes
0answers
86 views

Algorithm for the Simplication and Evaluation of Equations

As a new programmer messing around in python, I've been playing about with writing small programs which can calculate some of the stuff I did in maths at school. I've been trying to think of a way ...
0
votes
0answers
53 views

python: area mapping using trigonometric circle

I have a car controlled by a raspberry pi, I would like to create maps to each place it visits. The solution I came up with is simple. Lets say you tell the car to go forward and then after 5 minutes ...
0
votes
0answers
40 views

Strategy for “multi-level equality” test

It is well-known that Lisp supports multi-level equality test. I want to implement similar multi-level equality test on a custom class in Python. I know that I can (and should) override the __eq__, ...
0
votes
0answers
37 views

moving Data mining model from “lab” to production environment

I am designing the architecture of an analytics system . I have a data mining ensemble model developed in scikit learn . I want to move this to the production environment so the new incoming data can ...
0
votes
0answers
148 views

Python - Flask controller structure

This is my first python application (I have some experience in Java/groovy-grails), and therefore I am not confident of the application structure I should be following. My application has two ...
0
votes
0answers
75 views

Converting large files in python

I have a few files that are ~64GB in size that I think I would like to convert to hdf5 format. I was wondering what the best approach for doing so would be? Reading line-by-line seems to take more ...
0
votes
0answers
84 views

Check some value between each function call

Can you recommend a nice way of checking a particular value between calls to a set of functions? E.g. something like this in Python (might not be terribly 'Pythonic'): self.error_code = 0 # this ...
0
votes
0answers
132 views

How to algorithmically add notes to an existing midi file relative to positions of existing notes in python

I have a midi file that I'd like to algorithmically add notes to relative to other notes that already exist in the midi file using python, or if it's easier using a different language I'm open to that ...
-3
votes
0answers
43 views

set() is the value in a key:value pair?

I'm working on dictionary comprehension for a database so that I can save various database tables as nested dictionaries for easier data manipulation. SQLAlchemy Core has a good tutorial with an ...