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What's the common practice for enums in Python? [duplicate]
...
class Materials:
Shaded, Shiny, Transparent, Matte = range(4)
>>> print Materials.Matte
3
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How to put individual tags for a scatter plot
...10
data = np.random.random((N, 4))
labels = ['point{0}'.format(i) for i in range(N)]
plt.subplots_adjust(bottom = 0.1)
plt.scatter(
data[:, 0], data[:, 1], marker='o', c=data[:, 2], s=data[:, 3] * 1500,
cmap=plt.get_cmap('Spectral'))
for label, x, y in zip(labels, data[:, 0], data[:, 1]):
...
How to correctly implement custom iterators and const_iterators?
... class.
Define typedefs in your "custom container" class.
e.g. typedef blRawIterator< Type > iterator;
e.g. typedef blRawIterator< const Type > const_iterator;
Define "begin" and "end" functions
e.g. iterator begin(){return iterator(&m_data[0]);};
e.g. const_iterator cbegin()c...
What's the difference between passing by reference vs. passing by value?
...ing") though it never quite caught on. Moreover, neither of these phrases draws a parallel with the original pair. No wonder the old terms ended up being reused in the absense of anything better, leading to confusion.4
NOTE: For a long time, this answer used to say:
Say I want to share a web ...
R and version control for the solo data analyst
...your .Rnw files and not the .tex files that get produced from them. Store raw data if it would be a pain to re-acquire. If possible, write and store a script that acquires your data and another that cleans or modifies it rather than storing changes to raw data.
As for learning a version control s...
Efficient evaluation of a function at every cell of a NumPy array
...lot
perfplot.show(
setup=lambda n: np.random.rand(n,n)[::2,::2],
n_range=[2**k for k in range(0,12)],
kernels=[
f,
vf,
nb_vf
],
logx=True,
logy=True,
xlabel='len(x)'
)
B. comparison of exp:
import perfplot
import numexpr as ne # using ...
Converting from IEnumerable to List [duplicate]
...xtension method.
Example:
IEnumerable<int> enumerable = Enumerable.Range(1, 300);
List<int> asList = enumerable.ToList();
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What is the difference between `sorted(list)` vs `list.sort()`?
..., here's our setup:
import timeit
setup = """
import random
lists = [list(range(10000)) for _ in range(1000)] # list of lists
for l in lists:
random.shuffle(l) # shuffle each list
shuffled_iter = iter(lists) # wrap as iterator so next() yields one at a time
"""
And here's our results for a l...
How exactly does a generator comprehension work?
...mber from 1 to 10. You can do this in Python:
>>> [x**2 for x in range(1,11)]
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
here, range(1,11) generates the list [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], but the range function is not a generator before Python 3.0, and therefore the construct I've used is...
Can I run javascript before the whole page is loaded?
...es and defer are better options.
The spec has a useful diagram showing a raw script tag, defer, async, type="module", and type="module" async and the timing of when the JavaScript code is fetched and run:
Here's an example of the default behavior, a raw script tag:
.found {
color: gre...