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SqlAlchemy - Filtering by Relationship Attribute
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Use method has() of relationship (more readable):
patients = Patient.query.filter(Patient.mother.has(phenoscore=10))
or join (usually faster):
patients = Patient.query.join(Patient.mother, aliased=True)\
.filter_by(phenoscore=10)
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A connection was successfully established with the server, but then an error occurred during the pre
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This sounds more like a workaround than a fix. I wonder if the real problem has to do with connection pooling.
– jrummell
Jun 29 '11 at 18:55
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How to round up a number to nearest 10?
... can also pass a third variable if necessary to change the rounding mode.
More info here: http://php.net/manual/en/function.round.php
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what’s the difference between Expires and Cache-Control headers?
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Cache-Control was introduced in HTTP/1.1 and offers more options than Expires. They can be used to accomplish the same thing but the data value for Expires is an HTTP date whereas Cache-Control max-age lets you specify a relative amount of time so you could specify "X hours a...
C++: Rounding up to the nearest multiple of a number
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How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...ire" underneath, IIRC. I'm not familiar with local::lib, will need to read more to understand what it is about
– DVK
Mar 26 '10 at 22:00
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How to Save Console.WriteLine Output to Text File
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How to split data into training/testing sets using sample function
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There are numerous approaches to achieve data partitioning. For a more complete approach take a look at the createDataPartition function in the caTools package.
Here is a simple example:
data(mtcars)
## 75% of the sample size
smp_size <- floor(0.75 * nrow(mtcars))
## set the seed to ...
How do I make an attributed string using Swift?
... [ NSAttributedString.Key.shadow: myShadow ]
The rest of this post gives more detail for those who are interested.
Attributes
String attributes are just a dictionary in the form of [NSAttributedString.Key: Any], where NSAttributedString.Key is the key name of the attribute and Any is the value...