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How do I convert a numpy array to (and display) an image?
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You could use PIL to create (and display) an image:
from PIL import Image
import numpy as np
w, h = 512, 512
data = np.zeros((h, w, 3), dtype=np.uint8)
data[0:256, 0:256] = [255, 0, 0] # red patch in upper left
img = Image.fromarray(data, 'RGB')
img.save('my.png')
img.show()
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How should I log while using multiprocessing in Python?
Right now I have a central module in a framework that spawns multiple processes using the Python 2.6 multiprocessing module . Because it uses multiprocessing , there is module-level multiprocessing-aware log, LOG = multiprocessing.get_logger() . Per the docs , this logger has process-shared lock...
How do I “git blame” a deleted line?
...s - three dots means "r1 r2 --not $(git merge-base --all r1 r2). It is the set of commits that are reachable from either one of r1 (left side) or r2 (right side), but not from both." - source: "man gitrevisions"
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Pointers vs. values in parameters and return values
...r, a plain literal, or a useful zero value like bytes.Buffer.
Consider a Reset() method to put an object back in a blank state, like some stdlib types offer. Users who don't care or can't save an allocation don't have to call it.
Consider writing modify-in-place methods and create-from-scratch funct...
How do I remove a project configuration in Visual Studio 2008?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
Rails: How to reference images in CSS within Rails 4
...und-image: image-url("logo.png")
Agnostic helper:
background-image: asset-url("logo.png", image)
background-image: asset-url($asset, $asset-type)
Or if you want to embed the image data in the css file:
background-image: asset-data-url("logo.png")
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Random hash in Python
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A md5-hash is just a 128-bit value, so if you want a random one:
import random
hash = random.getrandbits(128)
print("hash value: %032x" % hash)
I don't really see the point, though. Maybe you should elaborate why you need this...
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Check if the number is integer
I was surprised to learn that R doesn't come with a handy function to check if the number is integer.
12 Answers
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What are the file limits in Git (number and size)?
...wer: the limit with Git is that each repository must represent a "coherent set of files", the "all system" in itself (you can not tag "part of a repository").
If your system is made of autonomous (but inter-dependent) parts, you must use submodules.
As illustrated by Talljoe's answer, the limit can...
What's the need of array with zero elements?
...ld not make the structure larger than the object being accessed; the
offset of the array shall remain that of the flexible array member, even if this would differ
from that of the replacement array. If this array would have no elements, it behaves as if
it had one element but the behavior ...