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Why (0-6) is -6 = False? [duplicate]
...tialization in a block of integer objects we saw above. The small integers range is from -5 to 256. Many Python programs spend a lot of time using integers in that range so this is a smart decision.
This is only an implementation detail of CPython and you shouldn't rely on this. For instance, PyPy...
Querying DynamoDB by date
...entation
Original Answer:
DynamoDB does not allow indexed lookups on the range key only. The hash key is required such that the service knows which partition to look in to find the data.
You can of course perform a scan operation to filter by the date value, however this would require a full tab...
Test if lists share any items in python
...port timeit
>>> timeit('bool(set(a) & set(b))', setup="a=list(range(1000));b=list(range(1000))", number=100000)
26.077727576019242
>>> timeit('any(i in a for i in b)', setup="a=list(range(1000));b=list(range(1000))", number=100000)
0.16220548999262974
Here's a graph of the ex...
Breaking out of nested loops [duplicate]
...
for x in xrange(10):
for y in xrange(10):
print x*y
if x*y > 50:
break
else:
continue # only executed if the inner loop did NOT break
break # only executed if the inner loop DID brea...
Filter by property
...se [:-5] # remove last AND
print clause
return modelType.objects.raw(clause)
With this universal subroutine, I can select all those elements which exactly equal my dictionary of 'specify' (propertyname,propertyvalue) combinations.
The first parameter takes a (models.Model),
the second...
How can I view MSIL / CIL generated by C# compiler? Why is it called assembly?
...ng and reverse-engineering assemblies. If you're doing anything that emits raw IL (e.g. you're writing a compiler or rewriting assembly IL, e.g. with Mono.Cecil) then ILDasm comes in handy because it can show you the raw structure of IL, token tables etc. Again, most non-IL experts will be confused ...
Mapping two integers to one, in a unique and deterministic way
..., here. The limitation of Cantor pairing function (relatively) is that the range of encoded results doesn't always stay within the limits of a 2N bit integer if the inputs are two N bit integers. That is, if my inputs are two 16 bit integers ranging from 0 to 2^16 -1, then there are 2^16 * (2^16 -1)...
Does Java 8 provide a good way to repeat a value or function?
...
For this specific example, you could do:
IntStream.rangeClosed(1, 8)
.forEach(System.out::println);
If you need a step different from 1, you can use a mapping function, for example, for a step of 2:
IntStream.rangeClosed(1, 8)
.map(i -> 2 * i - 1)
...
How to enumerate a range of numbers starting at 1
...entioned, this is straightforward to do in Python 2.6 or newer:
enumerate(range(2000, 2005), 1)
Python 2.5 and older do not support the start parameter so instead you could create two range objects and zip them:
r = xrange(2000, 2005)
r2 = xrange(1, len(r) + 1)
h = zip(r2, r)
print h
Result:
...
How to generate a range of numbers between two numbers?
... Your first "Demo" link keeps telling me String index out of range: 33
– slartidan
Nov 19 '15 at 7:33
1
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