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How to generate keyboard events in Python?
...
For both python3 and python2 you can use pyautogui (pip install pyautogui)
from pyautogui import press, typewrite, hotkey
press('a')
typewrite('quick brown fox')
hotkey('ctrl', 'w')
It's also crossplatform with Windows, OSX, and U...
Instance variables vs. class variables in Python
...y to make them yourself with python -mtimeit -- but having just done so in python3.4 I note that accessing an int class variable is actually about 5 to 11 nanoseconds faster than the same as instance variable on my old workstation -- not sure what codepath makes it so.
– Alex M...
How to extract the decision rules from scikit-learn decision-tree?
... @Josiah, add () to the print statements to make it work in python3. e.g. print "bla" => print("bla")
– Nir
Apr 26 at 19:24
...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...idely accepted and default async framework which works both on python2 and python3. Also the latest version 4.x brings a lot of functionality from https://docs.python.org/dev/library/asyncio.html.
I wrote an article, explaining why I consider that Tornado - the best Python web framework where I wro...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...s is my result:
The Python code(Python 3.5 + OpenCV 3.3):
#!/usr/bin/python3
# 2017.12.20 10:47:28 CST
# 2017.12.20 11:29:30 CST
import cv2
import numpy as np
##(1) read into bgr-space
img = cv2.imread("test2.jpg")
##(2) convert to hsv-space, then split the channels
hsv = cv2.cvtColor(img,...
Enable access control on simple HTTP server
... HTTPServer from the http.server module to run the server:
#!/usr/bin/env python3
from http.server import HTTPServer, SimpleHTTPRequestHandler, test
import sys
class CORSRequestHandler (SimpleHTTPRequestHandler):
def end_headers (self):
self.send_header('Access-Control-Allow-Origin', '...
multiprocessing.Pool: When to use apply, apply_async or map?
...ply:
apply(f,args,kwargs)
apply still exists in Python2.7 though not in Python3, and is generally not used anymore. Nowadays,
f(*args,**kwargs)
is preferred. The multiprocessing.Pool modules tries to provide a similar interface.
Pool.apply is like Python apply, except that the function call ...
How do I profile memory usage in Python?
....6 KiB
return _heapq.nlargest(n, self.items(), key=_itemgetter(1))
#3: python3.6/heapq.py:569: 0.5 KiB
result = [(key(elem), i, elem) for i, elem in zip(range(0, -n, -1), it)]
10 other: 2.2 KiB
Total allocated size: 4.0 KiB
Now here's a version inspired by another answer that starts a seco...
Short description of the scoping rules?
...
There was no thorough answer concerning Python3 time, so I made an answer here. Most of what is described here is detailed in the 4.2.2 Resolution of names of the Python 3 documentation.
As provided in other answers, there are 4 basic scopes, the LEGB, for Local, ...
Representing graphs (data structure) in Python
...all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
try:
del self._graph[node]
except KeyError:
p...