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Get the first element of each tuple in a list in Python [duplicate]
... hard to come by. I found this link and this one which should explain how it works. Also, the _ is just a normal variable. I could have done x,y and got the same results. However, I did not because it is a Python convention to use a _ for variables that are only placeholders.
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How do you use the ellipsis slicing syntax in Python?
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Ellipsis, or ... is not a hidden feature, it's just a constant. It's quite different to, say, javascript ES6 where it's a part of the language syntax. No builtin class or Python language constuct makes use of it.
So the syntax for it depends entirely on you, or som...
Ruby replace string with captured regex pattern
...m to be interested in the capture group, note that you can index a string with a regex:
"foo"[/oo/]
#=> "oo"
"Z_123: foobar"[/^Z_.*(?=:)/]
#=> "Z_123"
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Android Get Current timestamp?
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@kjdion84 excuse me, but why do you think it would be important ? Just based on the question.
– Cԃաԃ
Aug 2 '19 at 5:55
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How to find the operating system version using JavaScript?
...ct = Gecko
# productSub = 20050915
# plugins = [object PluginArray]
# securityPolicy =
# userAgent = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7
# cookieEnabled = true
# javaEnabled = function javaEnabled() { [native code] }
# taintEnabled = function taint...
Keyboard Interrupts with python's multiprocessing Pool
How can I handle KeyboardInterrupt events with python's multiprocessing Pools? Here is a simple example:
10 Answers
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tmux set -g mouse-mode on doesn't work
...rsion 2.1 (18 October 2015)
From the changelog:
Mouse-mode has been rewritten. There's now no longer options for:
- mouse-resize-pane
- mouse-select-pane
- mouse-select-window
- mode-mouse
Instead there is just one option: 'mouse' which turns on mouse support
So this is wha...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
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This is what solved it for us and these folks:
Our project started with Django 1.4, we went to 1.5 and then to 1.7. Our wsgi.py looked like this:
import os
from django.core.handlers.wsgi import WSGIHandler
os.environ['DJANGO_SETTINGS_MODULE'...
Can PostgreSQL index array columns?
I can't find a definite answer to this question in the documentation. If a column is an array type, will all the entered values be individually indexed?
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What is a plain English explanation of “Big O” notation?
I'd prefer as little formal definition as possible and simple mathematics.
41 Answers
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