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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
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However, the default Python driver for sqlite prevents transactional SQL. bugs.python.org/issue10740
– joeforker
Sep 17 '13 at 18:57
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Explain the concept of a stack frame in a nutshell
...ynamic languages also have their call stacks, don't they? I mean, if, say, Python wants to execute some procedure, the data about this procedure is stored inside of some Python interpreter's structure, am I correct? So I mean that call stack is present not only at a low level.
–...
What is the rationale for all comparisons returning false for IEEE754 NaN values?
... the nonreflexivity of NaNs has created no end of pain for languages like Python, with its equality-based containment semantics. You really don't want equality to fail to be an equivalence relation when you're trying to build containers on top of it. And having two separate notions of equality is...
What is the reason for performing a double fork when creating a daemon?
I'm trying to create a daemon in python. I've found the following question , which has some good resources in it which I am currently following, but I'm curious as to why a double fork is necessary. I've scratched around google and found plenty of resources declaring that one is necessary, but not ...
Select by partial string from a pandas DataFrame
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col
1 foobar
DataFrame.query
Supports string methods through the python engine. This offers no visible performance benefits, but is nonetheless useful to know if you need to dynamically generate your queries.
df1.query('col.str.contains("foo")', engine='python')
col
0 foo
1 foo...
How do I execute inserts and updates in an Alembic upgrade script?
... the official documentation, because it allows the use of agnostic SQL and pythonic writing and is also self-contained. SQLAlchemy Core is the best of both worlds for migration scripts.
Here is an example of the concept:
from sqlalchemy.sql import table, column
from sqlalchemy import String
from a...
Django Setup Default Logging
... the root key of the logging configuration dictionary. I found this in the Python documentation:
root - this will be the configuration for the root logger. Processing of the configuration will be as for any logger, except that the propagate setting will not be applicable.
Here's the configurat...
What is the difference between bottom-up and top-down?
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@coder000001: for python examples, you could google search for python memoization decorator; some languages will let you write a macro or code which encapsulates the memoization pattern. The memoization pattern is nothing more than "rather tha...
Change / Add syntax highlighting for a language in Sublime 2/3
...dard themes. While the JavaScript language definition isn't as thorough as Python's, for example, Neon still has a lot more diversity than some of the defaults like Monokai or Solarized.
I should note that I used @int3h's Better JavaScript language definition for this image instead of the one tha...
Is C++14 adding new keywords to C++?
...ax, break old code and proceed just with the evolved part of the language. Python kinda tries to do that
– Lorah Attkins
Dec 13 '14 at 8:32
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