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Installing Python 3 on RHEL
...manually:
Download (there may be newer releases on Python.org):
$ wget https://www.python.org/ftp/python/3.4.3/Python-3.4.3.tar.xz
Unzip
$ tar xf Python-3.*
$ cd Python-3.*
Prepare compilation
$ ./configure
Build
$ make
Install
$ make install
OR if you don't want to overwrite the pyth...
Thread Safety in Python's dictionary
...a lock here will add almost no overhead, and will give you peace of mind.
http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-thread-safe.htm has more details.
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Creating a singleton in Python
...ion of a class means and how to implement that definition. See for example http://code.activestate.com/recipes/498149/, which essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for metaclasses? also provides some examples, they generally ...
Python argparse mutual exclusive group
...
There is a python patch (in development) that would allow you to do this.
http://bugs.python.org/issue10984
The idea is to allow overlapping mutually exclusive groups. So usage might look like:
pro [-a xxx | -b yyy] [-a xxx | -c zzz]
Changing the argparse code so you can create two groups like...
How to read data From *.CSV file using javascript?
... }
lines.push(tarr);
}
}
// alert(lines);
}
http://jsfiddle.net/mblase75/dcqxr/
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Get city name using geolocation
...me="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Reverse Geocoding</title>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script> ...
How to limit the maximum value of a numeric field in a Django model?
...
You could also create a custom model field type - see http://docs.djangoproject.com/en/dev/howto/custom-model-fields/#howto-custom-model-fields
In this case, you could 'inherit' from the built-in IntegerField and override its validation logic.
The more I think about this, I re...
Role/Purpose of ContextLoaderListener in Spring?
...
<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee ...
Convert SVG to image (JPEG, PNG, etc.) in the browser
...:
Use the canvg JavaScript library to render the SVG image using Canvas: https://github.com/gabelerner/canvg
Capture a data URI encoded as a JPG (or PNG) from the Canvas, according to these instructions: Capture HTML Canvas as gif/jpg/png/pdf?
...
When should I use ugettext_lazy?
...d and untranslated. See the following example:
import logging
from django.http import HttpResponse
from django.utils.translation import ugettext as _, ugettext_noop as _noop
def view(request):
msg = _noop("An error has occurred")
logging.error(msg)
return HttpResponse(_(msg))
...