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Django: Get list of model fields?
...herits from models.Model . I want to get a list of all the fields defined for this model. For example, phone_number = CharField(max_length=20) . Basically, I want to retrieve anything that inherits from the Field class.
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Get Image size WITHOUT loading image into memory
...memory when calling .open. Looking at the docs of PIL 1.1.7, the docstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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but these hardly con...
How do I check if a string is valid JSON in Python?
In Python, is there a way to check if a string is valid JSON before trying to parse it?
4 Answers
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How to sort a list of objects based on an attribute of the objects?
... it's a list of Django objects, you should consider his solution. However, for the general case of sorting objects, my solution is probably best practice.
– Triptych
Dec 31 '08 at 17:12
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Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
...dle multiple namespaces and namespace aliases:
from io import StringIO # for Python 2 import from StringIO instead
import xml.etree.ElementTree as ET
# instead of ET.fromstring(xml)
it = ET.iterparse(StringIO(xml))
for _, el in it:
prefix, has_namespace, postfix = el.tag.partition('}')
if...
Undefined reference to `pow' and `floor'
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Thanks! I've been googling for the past 30 minutes and this is the first reference that said to link the libraries after the objects
– Dave Baghdanov
Nov 6 '13 at 22:13
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Which is better in python, del or delattr?
This may be silly, but it's been nagging the back of my brain for a while.
8 Answers
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Understanding scala enumerations
...e Value.
It so happens that you can write val a, b, c = foo in Scala, and for each value a, b, and c the method foo will be called again and again. Enumeration uses this trick to increment an internal counter so that each value is individual.
If you open the Scala API docs for Enumeration and clic...
Understanding the main method of python [duplicate]
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Using this convention one can have a file define classes and functions for use in other programs, and also include code to evaluate only when the file is called as a standalone script.
It's important to understand that all of the code above the if __name__ line is being executed, evaluated, in ...
Hidden Features of PHP? [closed]
...n gets my vote. I haven't encountered a more thorough online documentation for a programming language - everything else I have to piece together from various websites and man pages.
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