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How to write header row with csv.DictWriter?
...ple example of using the writeheader() method now available in 2.7 / 3.2:
from collections import OrderedDict
ordered_fieldnames = OrderedDict([('field1',None),('field2',None)])
with open(outfile,'wb') as fou:
dw = csv.DictWriter(fou, delimiter='\t', fieldnames=ordered_fieldnames)
dw.writeh...
What does the `forall` keyword in Haskell/GHC do?
... a -> b.
A confusing point: you may hear that when you omit the forall from a type it is actually still implicitly there. (from Norman's answer: "normally these languages omit the forall from polymorphic types"). This claim is correct, but it refers to the other uses of forall, and not to the Sc...
What is Mocking?
... internal parts) or a plastic banana in front of it. You can save yourself from investing in 1000 real laptops and rotting bananas.
The point is you're not trying to test if the banana is fake or not. Nor testing if the laptop is fake or not. All you're doing is testing if your machine once it sees ...
Is there a “do … until” in Python? [duplicate]
...
There is no do-while loop in Python.
This is a similar construct, taken from the link above.
while True:
do_something()
if condition():
break
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visual studio not remembering open documents & startup project
...devenv.exe that isn't quitting properly? Do you run the Solution Navigator from Productivity Power Tools and could it be futzing with your settings? Basically I have no more ideas, sorry :-)
– Dan F
Jul 16 '11 at 21:06
...
The model backing the context has changed since the database was created
...
Here's some information from Scott Gu's Blog posted by Jeff on what's actually taking place:
For those who are seeing this exception:
"The model backing the 'Production' context has changed since the
database was created. Either manually ...
Multiple columns index when using the declarative ORM extension of sqlalchemy
... SQSAlchemy, trying to figure out a how to substitute mytable.c.somecol.
from sqlalchemy import Index
Index('someindex', mytable.c.somecol.desc())
We can just use the model property and call .desc() on it:
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class GpsReport(db.Model):
...
In HTML5, is the localStorage object isolated per page/domain?
...mysite.it:8012/App2 have shared local storage. (Caveat: If you access them from different protocols, EG http vs https, those are not shared. Within the same protocol, subdomain, domain, and port -- they are shared. This is a simplification of the concept of 'Origin'.)
– William...
How do you rename a Git tag?
...s/tags/old
git push --tags
The colon in the push command removes the tag from the remote repository. If you don't do this, Git will create the old tag on your machine when you pull.
Finally, make sure that the other users remove the deleted tag. Please tell them (co-workers) to run the following ...
Creating and Update Laravel Eloquent
...ravel Documentation at :
https://laravel.com/docs/5.3/eloquent
One example from there is:
// If there's a flight from Oakland to San Diego, set the price to $99.
// If no matching model exists, create one.
$flight = App\Flight::updateOrCreate(
['departure' => 'Oakland', 'destination' => 'S...