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How to speed up insertion performance in PostgreSQL
...u've batched your work into big transactions, though.
INSERT or COPY in parallel from several connections. How many depends on your hardware's disk subsystem; as a rule of thumb, you want one connection per physical hard drive if using direct attached storage.
Set a high checkpoint_segments value an...
logger configuration to log to file and print to stdout
...d the StreamHandler. The StreamHandler writes to stderr. Not sure if you really need stdout over stderr, but this is what I use when I setup the Python logger and I also add the FileHandler as well. Then all my logs go to both places (which is what it sounds like you want).
import logging
logging.g...
Expanding a parent to the height of its children
...low:auto means that the browser should decide which value to apply. What really does the trick is overflow: overlay.
– Alba Mendez
Jul 30 '11 at 12:05
...
Transfer git repositories from GitLab to GitHub - can we, how to and pitfalls (if any)?
... https URL of the GitHub repo:
The requested URL returned an error: 403
All you need to do is to enter your GitHub password, but the OP suggests:
Then you might need to push it the ssh way. You can read more on how to do it here.
See "Pushing to Git returning Error Code 403 fatal: HTTP requ...
Does pandas iterrows have performance issues?
...
Generally, iterrows should only be used in very, very specific cases. This is the general order of precedence for performance of various operations:
1) vectorization
2) using a custom cython routine
3) apply
a) reductions tha...
Relative imports in Python 3
...ython3.
The simplest fix for this case, assuming the name mymodule is globally unique, would be to avoid using relative imports, and just use...
from mymodule import as_int
...although, if it's not unique, or your package structure is more complex, you'll need to include the directory containing...
How do you match only valid roman numerals with a regular expression?
...0,3})$
Breaking it down, M{0,4} specifies the thousands section and basically restrains it to between 0 and 4000. It's a relatively simple:
0: <empty> matched by M{0}
1000: M matched by M{1}
2000: MM matched by M{2}
3000: MMM matched by M{3}
4000: MMMM matched by M...
Some font-size's rendered larger on Safari (iPhone)
...blem you're describing centers around the fact that Mobile Safari automatically scales text if it thinks the text will render too small. You can get around this with the CSS property -webkit-text-size-adjust. Here's a sample of how to apply this to your body, just for the iPhone:
@media screen and...
Linq: What is the difference between Select and Where
...rable<A> in, IEnumerable<A> out
Select
returns something for all items in the source (projection / transformation). That something might be the items themselves, but are more usually a projection of some sort.
-> IEnumerable<A> in, IEnumerable<B> out
...
Why are dashes preferred for CSS selectors / HTML attributes?
...re separated with underscore and there were no stops.
Also, using hyphens allows you to take advantage of the |= attribute selector, which selects any element containing the text, optionally followed by a dash:
span[class|="em"] { font-style: italic; }
This would make the following HTML elements...