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What does -> mean in Python function definitions?
...cause most python libraries still aim to be compatible with python2.x. As python3.x begins to become more standard, we might see more of these things popping up here and there...
– mgilson
Jan 17 '13 at 14:15
...
Sending HTML email using Python
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for python3, improve @taltman 's answer:
use email.message.EmailMessage instead of email.message.Message to construct email.
use email.set_content func, assign subtype='html' argument. instead of low level func set_payload and ...
Counting the Number of keywords in a dictionary in python
...Some modifications were made on posted answer UnderWaterKremlin to make it python3 proof. A surprising result below as answer.
System specs:
python =3.7.4,
conda = 4.8.0
3.6Ghz, 8 core, 16gb.
import timeit
d = {x: x**2 for x in range(1000)}
#print (d)
print (len(d))
# 1000
print (len(d.keys()...
How to convert list of tuples to multiple lists?
...ppend is 3x - 4x faster than zip! The test script is here:
#!/usr/bin/env python3
import time
N = 2000000
xs = list(range(1, N))
ys = list(range(N+1, N*2))
zs = list(zip(xs, ys))
t1 = time.time()
xs_, ys_ = zip(*zs)
print(len(xs_), len(ys_))
t2 = time.time()
xs_, ys_ = [], []
for x, y in zs:
...
multiprocessing: How do I share a dict among multiple processes?
... that can be converted to dict
pprint.pprint(dict(d))
Output:
$ python3 mul.py
{22562: 'Hi, I was written by process 22562',
22563: 'Hi, I was written by process 22563',
22564: 'Hi, I was written by process 22564',
22565: 'Hi, I was written by process 22565',
22566: 'Hi, I was writte...
Python - List of unique dictionaries
... 34, 'id': 1, 'name': 'john'}, {'age': 30, 'id': 2, 'name': 'hanna'}]
In Python3
>>> L=[
... {'id':1,'name':'john', 'age':34},
... {'id':1,'name':'john', 'age':34},
... {'id':2,'name':'hanna', 'age':30},
... ]
>>> list({v['id']:v for v in L}.values())
[{'age': 34, 'id': 1, 'nam...
Python Sets vs Lists
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@RyneWang this is true, but only for Python3. In Python2 range returns a normal list (that's why exists horrible things like xrange)
– Manoel Vilela
Dec 11 '18 at 17:55
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Getting the name of a variable as a string
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On python3, this function will get the outer most name in the stack:
import inspect
def retrieve_name(var):
"""
Gets the name of var. Does it from the out most frame inner-wards.
:param var: variable t...
Find the most common element in a list
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This breaks on Python3 if your list has different types.
– AlexLordThorsen
Feb 24 '16 at 22:47
2
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C++应用程序添加VBScript和JavaScript支持 - C/C++ - 清泛网 - 专注IT技能提升
...C++程序中调用JavaScript及VBScript。效果截图：
源码点此下载。
Introduction
I am always amazed to see how the script control (msscript.ocx) is fun to use and at the same time how C++ developers reacted when it's time to use. Maybe the extension (.ocx) make them feel, it's vis...