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django admin - add custom form fields that are not part of the model
...e also given an example of how you might use these values in form.save():
from django import forms
from yourapp.models import YourModel
class YourModelForm(forms.ModelForm):
extra_field = forms.CharField()
def save(self, commit=True):
extra_field = self.cleaned_data.get('extra_f...
How to avoid explicit 'self' in Python?
... @Roger Pate: Please stop editing my question to remove python from it. I think that it belongs there. (and thanks for the answer!)
– bguiz
Nov 1 '10 at 3:25
3
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Java regex capturing groups indexes
...or 1*0, then $) versus ^0*1|1*0$ (^0*1 or 1*0$).
A capturing group, apart from grouping, will also record the text matched by the pattern inside the capturing group (pattern). Using your example, (.*):, .* matches ABC and : matches :, and since .* is inside capturing group (.*), the text ABC is rec...
python setup.py uninstall
... How can I re-install the package I have the source code of using setup.py from it?
– アレックス
Mar 28 '15 at 12:57
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difference between socket programming and Http programming
...basically means that HTTP itself can't be used to transport information to/from a remote end point. Instead it relies on an underlying protocol which in HTTP's case is TCP.
You can read more about OSI layers if you are interested.
Sockets on the other hand are an API that most operating systems ...
Is a statically-typed full Lisp variant possible?
...toms in the tree to be of the same type. We want them to be able to differ from leaf to leaf. A better approach requires the use of Haskell's existential quantifiers:
class Atomic a where ?????
data Cons = CCons Cons Cons
| forall a. Atomic a => CAtom a
But now you come to the cr...
Git push branch from one remote to another?
... 'refs/remotes/korg/*:refs/heads/*'
And it pushed all my remote branches from korg to rorg (even without local copies of the branches). See the output below:
Counting objects: 293, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (67/67), done.
Writing objects: 100% (176/1...
Android Closing Activity Programmatically
What is the equivalent operation within an activity to navigating away from the screen. Like when you press the back button, the activity goes out of view. How can this be called from inside an activity so that it closes itself.
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How can I specify a local gem in my Gemfile?
...
I had to remove version directive from the gem line to get this to work.
– Epigene
Jan 27 '16 at 15:20
4
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Using numpy to build an array of all combinations of two arrays
... FYI: seems to have made it into the scikit-learn package at from sklearn.utils.extmath import cartesian
– Gus
Sep 13 '13 at 4:27
2
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