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 ...

learn more… | top users | synonyms (1)

2
votes
2answers
852 views

Front-end structure of large scale Django project

Few days ago, I started to work in new company. Before me, all front-end and backend code was written by one man. As you know, Django app contains two main directories for front-end: /static - for ...
1
vote
2answers
97 views

Efficient datastructure to create size-limited dictionary

I need a class that acts like a dictionary but will constrain the total number of key/value pairs it contains. For instants, let's say the maximum number of entries is 1000 and the class already ...
1
vote
2answers
87 views

Technique to synchronize error codes in a same-project-API

In the project I am working right now, we have some python and some C# code. At some point, I call from python a subprocess which starts a C# executable. This C# code returns an error code, which has ...
1
vote
1answer
442 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, ...
1
vote
1answer
252 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 ...
0
votes
1answer
87 views

Best strategy for converting change in longitude and latitude to north, south, east, west in degrees

This is not a class assignment but a conceptual question I'm struggling with for a personal project. I need to convert a large paired group of long and lat coordinate values that show a ...
0
votes
1answer
165 views

Facing MemoryError in Python

I wrote a program to find prime factors of a number. When I give a large number(600851475143) as input, MemoryError pops up. Below is the code: def fact(a): factors = [] for i in ...
0
votes
1answer
75 views

using one database connection across multiple functions in python

whats the best way to go about this in python? I have a number of like so def test1() .... code ..... def test2() .... code ..... def test3() .... code ..... how could I create one ...
0
votes
1answer
124 views

Making a sldprt to PDB file converter?

I wanted to create a parser that can read a solidworks file and turn it into a protein data bank file. This has already been done in a program called DiamondCAD. ...
-2
votes
1answer
216 views

Base Class, with method that returns Derived Class. design flaw?

I'm writing a Math equation solver in python (for fun). The first design that came to my mind: Expression: base class for every item in an equation (maybe bad name). BinaryExpression extends ...
3
votes
0answers
64 views

Breaking a table over multiple lines in Sphinx

Lets say I have the following function with a docstring: def foo(*args): """ do some fooness +----------------------------+----------------------------------------------------+ | ...
2
votes
0answers
45 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
364 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
49 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
40 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
145 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
172 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
68 views

Check distance between all elements in a list of numbers in O(n*lg(n))

I have an exercise for my algorithms and data structures class, where I basically have to implement a divide and conquer algorithm or function called check_distance to determine whether all numbers in ...
1
vote
0answers
44 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
136 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
30 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
35 views

Structuring a multi-language project?

Let's say 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 ...
1
vote
0answers
27 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
37 views

Persist data downloaded by Celery workers

I'm working in a tool that downloads tweets from Twitter to process them later. For this purpose I'm using Celery with RabbitMQ, sending task with the keywords that must be tracked by the workers. My ...
1
vote
0answers
38 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
43 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
210 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
61 views

how to test a generator with unittest?

I have programmed a small iterator in Python: class anything(): def __init__(self): self.i=1 def __iter__(self): return self def next(self): if self.i>100: ...
1
vote
0answers
111 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
232 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
15 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
29 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
54 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
34 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
23 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
31 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
61 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
28 views

How to deal with multiple output modes of multiple types?

Note: The business domain being a bit complicated to explain, I replaced the names of actual classes by more illustrative examples. I'm writing an application in which the business layer returns a ...
0
votes
0answers
40 views

Defining property and find substitution for copy function of python in cython

I want to cythonize a code in python to speed up the code. In the following you can see my attempt to make my python class understandable for cython: import numpy as np cimport numpy as np ctypedef ...
0
votes
0answers
30 views

API providing function to be run in a thread vs. thread that runs this function

I'm writing a Python library which exposes a certain event listener interface. The user can register callbacks to handle different types of events. There is also a function which handles the actual ...
0
votes
0answers
69 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
78 views

streaming data in memory aggregation

We have a stream of data we're aggregating stats over and putting into a python dictionary (sent from kafka). Every X time interval, We update our database with these aggregated metrics. This ...
0
votes
0answers
173 views

subclass QAbstractTableModel - reuse as much code as possible

in my PyQt application I am heavily using the model/view approach. For every model I create, I do the following: class myModel(QtCore.QAbstractTableModel): def __init__(self, parent = None): ...
0
votes
0answers
80 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
124 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 ...
0
votes
0answers
298 views

Embed Python into Lua?

I've found a lot of things about embedding Lua into Python, but I was wondering is is possible to embed Python into Lua? I've searched for a while, and couldn't find anything on it, so maybe some of ...