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How to serialize SqlAlchemy result to JSON?
...n json.JSONEncoder.default(self, obj)
return AlchemyEncoder
You can now call it with:
print json.dumps(e, cls=new_alchemy_encoder(False, ['parents']), check_circular=False)
To only expand SQLAlchemy fields called 'parents', for example.
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How to display unique records from a has_many through relationship?
...through => :orders, :uniq => true is deprecated. Instead, you should now write has_many :products, -> { distinct }, through: :orders. See the distinct section for has_many: :through relationships on the ActiveRecord Associations documentation for more information. Thanks to Kurt Mueller fo...
Import package.* vs import package.SpecificType [duplicate]
...
import a.*;
import b.*;
...
Foo f;
and class Foo exists in package a.
Now you check in your perfectly compiling code, and six months later, someone adds class Foo to package b. (Perhaps it's a third party lib that added classes in the latest version).
Poof! Now your code refuses to compile.
N...
How to write header row with csv.DictWriter?
...f writing the header row.
Simple 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=orde...
Android studio Gradle build speed up
...are working on it. Like I posted in this answer the fastest solution right now is to use gradle from the command line and you should switch to binary libs for all modules you do not develop. On g+ there is a discussion with the developers about it.
...
brew update: The following untracked working tree files would be overwritten by merge:
...ntually run brew doctor again to ensure yourself that the warning is gone.
Now, you should have a
Warning: You have uncommitted modifications to Homebrew
that may bey solved by
cd /usr/local/Library && git stash && git clean -d -f
as suggested by Dr.Brew itself. The command sta...
ImportError: no module named win32api
...hat, you must run
python Scripts/pywin32_postinstall.py -install
I know I'm reviving an old thread, but I just had this problem and this was the only way to solve it.
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Downloading all maven dependencies to a directory NOT in repository?
...e you need your app's dependencies for whatever reason. I'm using it right now to inspect the dependent libraries for redundant API definitions (e.g. some libraries will include Javax APIs, which can conflict with other versions of the same API), but it's also good if your app needs its dependencies...
Why java.io.File doesn't have a close() method?
...g like RandomAccessFileStream could be better, but it's many year too late now.
– maaartinus
Jan 20 '11 at 20:48
7
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Selecting multiple columns in a pandas dataframe
I have data in different columns but I don't know how to extract it to save it in another variable.
18 Answers
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