This whole topic is way out of my depth, so forgive my imprecise question, but I have two computers both connected to one LAN. What I want is to be able to communicate one string between the two, by running a python script on the first (the host) where the string will originate, and a second on the client computer to retrieve the string...
I have a database which is synchronized against an external web source twice a day. This web source contains a bunch of entries, which have names and some extra information about these names. Some of these names are silly and I want to rename them when inserting them into my own database. To rename these silly names, I have a standard d...
I would like to perform something similar to this (ie get the sum of distinct event amounts in a payment table then group the payments by event details and total money paid for them. Also getting users and what they have paid for an event will be done) in Django using PostgreSQL. My models are as below: class UserProfile(User): on...
I have a bunch of coordinates which are the control points of a clamped uniform cubic B-spline on the 2D plane. I would like to draw this curve using Cairo calls (in Python, using Cairo's Python bindings), but as far as I know, Cairo supports Bézier curves only. I also know that the segments of a B-spline between two control points can b...
I first ran into this when trying to determine the relative performance of two generators: t = timeit.repeat('g.get()', setup='g = my_generator()') So I dug into the timeit module and found that the setup and statement are evaluated with their own private, initially empty namespaces so naturally the binding of g never becomes accessib...
I have a python script that ends with running a program (iexpress.exe) in a dos prompt. The program that runs in dos prompt, uses a dir called workdir. After the program has finished in the dos prompt I would like python to delete the dir. I have just made a simple solution of putting a delay of 30sec: time.sleep(30) removeall(workdir)...
Is there any way to block a critical area like with Java synchronized in Django? ...
I want to build a REST web service on app engine. Currently i have this: from google.appengine.ext import webapp from google.appengine.ext.webapp import util class UsersHandler(webapp.RequestHandler): def get(self, name): self.response.out.write('Hello '+ name+'!') def main(): util.run_wsgi_app(application) #Map url like /res...
I find this syntax astoundingly annoying. Every time I rename my class, I have to change this call for no apparent reason. Isn't there some __class__ magic variable or something I can use at least? Interested in answers for Python 2.5, but it doesn't hurt to know if later versions fixed this. ...
How would I check if the remote host is up without having a port number? Is there any other way I could check other then using regular ping. There is a possibility that the remote host might drop ping packets ...
like this site : http://www.housingmaps.com/ thanks ...
Edit: This question has already been asked and answered, and I apparently am not good at using the search wizard. See http://stackoverflow.com/questions/120926/why-does-python-pep-8-strongly-recommend-spaces-over-tabs-for-indentation and the link in the comments. Thanks for replying to those who did so. I want to start a new project, ...
I have a python app which is supposed to be very long-lived, but sometimes the process just disappears and I don't know why. Nothing gets logged when this happens, so I'm at a bit of a loss. Is there some way in code I can hook in to an exit event, or some other way to get some of my code to run just before the process quits? I'd li...
I've never done any unit testing before, and would like to learn what it is and how it can be useful in my Python code. I've read through a few Python unit testing tutorials online but they're all so complicated and assume an extended programming background. I'm using Python with Pylons to create a simple web app. Any simple examp...
How do I pass an argument to my custom save method, preserving proper *args, **kwargs for passing to te super method? I was trying something like: form.save(my_value) and def save(self, my_value=None, *args, **kwargs): super(MyModel, self).save(*args, **kwargs) print my_value But this doesn't seem to work. What am I doing w...
I'm really new to C -> Python interaction and am currently writing a small app in C which will read a file (using Python to parse it) and then using the parsed information to execute small Python snippets. At the moment I'm feeling very much like I'm reinventing wheels, for example this function: typedef gpointer (list_func)(PyObject *o...
I'm currently reading chapter 5.8 of Dive Into Python and Mark Pilgrim says: There are no constants in Python. Everything can be changed if you try hard enough. This fits with one of the core principles of Python: bad behavior should be discouraged but not banned. If you really want to change the value of None, you can do it, but don...
What's wrong with this snippet of code? import numpy as np from scipy import stats d = np.arange(10.0) cutoffs = [stats.scoreatpercentile(d, pct) for pct in range(0, 100, 20)] f = lambda x: np.sum(x > cutoffs) fv = np.vectorize(f) # why don't these two lines output the same values? [f(x) for x in d] # => [0, 1, 2, 2, 3, 3, 4, 4, 5, 5]...
i want a way to do this. thanks ...
Python list comprehensions are nice, but near impossible to debug. You guys have any good tips / tools for debugging them? ...