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How to make a chain of function decorators?
...the documentation to see how decorators work. Here is what you asked for:
from functools import wraps
def makebold(fn):
@wraps(fn)
def wrapped(*args, **kwargs):
return "<b>" + fn(*args, **kwargs) + "</b>"
return wrapped
def makeitalic(fn):
@wraps(fn)
def wr...
How to add an email attachment from a byte array?
... FWIW, Mono's Attachment class calls Dispose on the content stream, and from a quick test case, .NET 4.0 does the same. I'm not super-amused that this is the case, but there it is.
– Matt Enright
May 19 '11 at 22:12
...
Find out time it took for a python script to complete execution
...
from datetime import datetime
startTime = datetime.now()
#do something
#Python 2:
print datetime.now() - startTime
#Python 3:
print(datetime.now() - startTime)
...
How to print a percentage value in python?
...3%
If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be written without the explicit
# float conversion:
>>> print "{0:.0f}%".f...
What is the ultimate postal code and zip regex?
...s, some can contain spaces, others dots, the number of characters can vary from two to at least six...
What you could do (theoretically) is create a seperate regex for every country in the world, not recommendable IMO. But you would still be missing on the validation part: Zip code 12345 may exist,...
how does multiplication differ for NumPy Matrix vs Array classes?
... rules of linear algebra
some code snippets to illustrate:
>>> from numpy import linalg as LA
>>> import numpy as NP
>>> a1 = NP.matrix("4 3 5; 6 7 8; 1 3 13; 7 21 9")
>>> a1
matrix([[ 4, 3, 5],
[ 6, 7, 8],
[ 1, 3, 13],
[ 7, 21, 9...
How exactly do Django content types work?
...Blah blah, let's dive into some code and see what I mean.
# ourapp.models
from django.conf import settings
from django.db import models
# Assign the User model in case it has been "swapped"
User = settings.AUTH_USER_MODEL
# Create your models here
class Post(models.Model):
author = models.Forei...
Rerender view on browser resize with React
...e event, something like this:
import React, { useLayoutEffect, useState } from 'react';
function useWindowSize() {
const [size, setSize] = useState([0, 0]);
useLayoutEffect(() => {
function updateSize() {
setSize([window.innerWidth, window.innerHeight]);
}
window.addEventL...
Append integer to beginning of list in Python [duplicate]
... @KeminZhou I'd prefer the name "prepend" as it follows naturally from "append" as "push_front" follows naturally from "push_back".
– god of llamas
Nov 15 '16 at 0:29
1
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How to get one value at a time from a generator function in Python?
Very basic question - how to get one value from a generator in Python?
6 Answers
6
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