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Using OR in SQLAlchemy
...you have a long list of things to OR, you can do filter(or_(User.name == v for v in ('Alice', 'Bob', 'Carl')))
– robru
Aug 26 '15 at 20:21
69
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How to divide flask app into multiple py files?
...ules, see the Flask docs.
However,
Flask uses a concept of blueprints for making application components and supporting common patterns within an application or across applications.
You can create a sub-component of your app as a Blueprint in a separate file:
simple_page = Blueprint('simple_p...
How do i find out what all symbols are exported from a shared object?
...These are all different things, and your question conflates them all :-(
For an AIX shared object, use dump -Tv /path/to/foo.o.
For an ELF shared library, use readelf -Ws /path/to/libfoo.so, or (if you have GNU nm) nm -D /path/to/libfoo.so.
For a non-ELF UNIX shared library, please state which UNI...
Which method performs better: .Any() vs .Count() > 0?
...e GetEnumerator()/MoveNext()/Dispose() sequence required by Any() to check for a non-empty IEnumerable<T> sequence.
For just IEnumerable<T>, then Any() will generally be quicker, as it only has to look at one iteration. However, note that the LINQ-to-Objects implementation of Count() do...
Class method differences in Python: bound, unbound and static
...type (the class of a class, cf. this question) to not create bound methods for method_two.
Now, you can invoke static method both on an instance or on the class directly:
>>> a_test = Test()
>>> a_test.method_one()
Called method_one
>>> a_test.method_two()
Called method_...
How can I get the current network interface throughput statistics on Linux/UNIX? [closed]
Tools such as MRTG provide network throughput / bandwidth graphs for the current network utilisation on specific interfaces, such as eth0. How can I return that information at the command line on Linux/UNIX?
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What does it mean if a Python object is “subscriptable” or not?
... to mathematical notation that uses actual subscripts; e.g. a[1] is Python for what mathematicians would write as a₁. So "subscriptable" means "able to be subscripted". Which, in Python terms, means it has to implement __getitem__(), since a[1] is just syntactic sugar for a.__getitem__(1).
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How to perform OR condition in django queryset?
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Is it better to use this type of query or perform two separate queries?
– MHB
Mar 16 at 15:06
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Lazy Method for Reading Big File in Python?
... break
yield data
with open('really_big_file.dat') as f:
for piece in read_in_chunks(f):
process_data(piece)
Another option would be to use iter and a helper function:
f = open('really_big_file.dat')
def read1k():
return f.read(1024)
for piece in iter(read1k, ''):...
How to automatically generate N “distinct” colors?
...ike so:
// assumes hue [0, 360), saturation [0, 100), lightness [0, 100)
for(i = 0; i < 360; i += 360 / num_colors) {
HSLColor c;
c.hue = i;
c.saturation = 90 + randf() * 10;
c.lightness = 50 + randf() * 10;
addColor(c);
}
...