I'm trying to create a word ladder program in python. I'd like to generate words that are similar to a given word. In c++ or java, I would go through each valid index in the original string, and replace it with each letter in the english alphabet, and see if the result is a valid word. for example (pseudocode) for (int i = 0; i < word.l...
I'd like to be able to do something like this: from dotDict import dotdictify life = {'bigBang': {'stars': {'planets': [] } } } dotdictify(life) #this would be the regular way: life['bigBang']['stars']['planets'] = {'earth': {'singleCellLife': {} }} #But how can we make this work? life.bigBang.stars.planets.e...
I have a scenario in which I need a self reference property as follow: class Post(db.Model): creator = db.UserProperty() post_title = db.StringProperty(required=True) post_status = db.StringProperty(required=True, choices=['draft', 'published']) post_parent = db.SelfReferenceProperty() Now, I want ensure that an entity shouldn...
I am building a trading portfolio management system that is responsible for production, optimization, and simulation of non-high frequency trading portfolios (dealing with 1min or 3min bars of data, not tick data). I plan on employing Amazon web services to take on the entire load of the application. I have four choices that I am cons...
This is the problem: How many integers 0 n < 1018 have the property that the sum of the digits of n equals the sum of digits of 137n? This solution is grossly inefficient. What am I missing? #!/usr/bin/env python #coding: utf-8 import time from timestrings import * start = time.clock() maxpower = 18 count = 0 for i in r...
I recently got my first app to work in uWSGI with Cherokee. I used the following code taken from the uWSGI docs: def application(environ, start_response): start_response('200 OK', [('Content-Type', 'text/plain')]) yield 'Hello World\n' The page correctly reads Hello World. When I change that text to New Thing and refresh, nothing ...
I have 20 labels in my page: In [85]: sel.get_xpath_count("//label") Out[85]: u'20' And I can get the first one be default: In [86]: sel.get_text("xpath=//label") Out[86]: u'First label:' But, unlike the xpath docs I've found, I'm getting an error trying to subscript the xpath to get to the second label's text: In [87]: sel.get_te...
Looking for good source code either in C or C++ or Python to understand how a hash function is implemented and also how a hash table is implemented using it. Very good material on how hash fn and hash table implementation works. Thanks in advance. ...
Whenever I change my python source files in my Django project, the .pyc files become out of date. Of course that's because I need to recompile them in order to test them through my local Apache web server. I would like to get around this manual process by employing some automatic means of compiling them on save, or on build through Ecl...
Hi, I have a tricky Django problem which didn't occur to me when I was developing it. My Django application allows a user to sign up and store his login credentials for a sites. The Django application basically allows the user to search this other site (by scraping content off it) and returns the result to the user. For each query, it d...
I'm using python's sendmail in the following way: msg = <SOME MESSAGE> s = smtplib.SMTP('localhost') s.sendmail(me, you, msg.as_string()) s.quit() This usually works fine (I.e I get the email) but it fails (I.e no exception is shown but the email just doesn't arrive) when the message is pretty big (around 200 lines). Any ideas what ca...
Conclusion: It seems that HDF5 is the way to go for my purposes. Basically "HDF5 is a data model, library, and file format for storing and managing data." and is designed to handle incredible amounts of data. It has a Python module called python-tables. (The link is in the answer below) HDF5 does the job done 1000% better in sa...
Hello, Lets say I have a time 04:05 and the timezone is -0100 (GMT) I want to calculate the new time which will be 03:05 Is there any function in python to do that calculcation ? Thanks ...
Several times (even several in a row) I've been bitten by the defaultdict bug: forgetting that something is actually a defaultdict and treating it like a regular dictionary. d = defaultdict(list) ... try: v = d["key"] except KeyError: print "Sorry, no dice!" For those who have been bitten too, the problem is evident: when d has ...
Hello app engineers! I'm on an app engine project where I'd like to put in a link to a Javascript test runner that I'd like to only exist when running the development server. I've made some experiments on a local shell with configuration loaded using the technique found in NoseGAE versus live on the 'App Engine Console' [1] and it looks ...
Hi I have a number of processes running which are controlled by remote clients. A tcp server controls access to these processes, only one client per process. The processes are given an id number in the range of 0 -> n-1. Were 'n' is the number of processes. I use a dictionary to map this id to the client sockets file descriptor. On star...
Hello, I am looking for the best way to have an history of my models (interger & float fields) in Django. I read http://stackoverflow.com/questions/1952913/keeping-a-history-of-data-changes-in-database and it seems that triggers are the best option. My idea is to stay database agnostic if possible. How do you approach this issues in y...
I want a script to start and interact with a long running process. The process is started first time the script is executed, after that the script can be executed repeatedly, but will detect that the process is already running. The script should be able to interact with the process. I would like this to work on Unix and Windows. I am un...
What I want to do is to have a subroutine that analyses every 200 milliseconds of a sound file which it is given and spits out the frequency intensity value (from 0 to 1 as a float) of a specific frequency range into an array which I later save. This value then goes on to be used as the opacity value for a graphic which is supposed to 's...
When I was using the built-in simple server, everything is OK, the admin interface is beautiful: python manage.py runserver However, when I try to serve my application using a wsgi server with django.core.handlers.wsgi.WSGIHandler, Django seems to forget where the admin media files is, and the admin page is not styled at all: gunicorn...