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Execution of Python code with -m option or not
... sys.path.
so
python -m pdb
is roughly equivalent to
python /usr/lib/python3.5/pdb.py
(assuming you don't have a package or script in your current directory called pdb.py)
Explanation:
Behavior is made "deliberately similar to" scripts.
Many standard library modules contain code that i...
Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...脚本实在太啰嗦，你只是想做一些备份文件、安装软件、下载数据之类的事情，学着使用sh，bash会是一个好主意。
shell只定义了一个非常简单的编程语言，所以，如果你的脚本程序复杂度较高，或者要操作的数据结构比较复杂...
Manually raising (throwing) an exception in Python
...
In Python3 there are 4 different syntaxes for rasing exceptions:
1. raise exception
2. raise exception (args)
3. raise
4. raise exception (args) from original_exception
1. raise exception vs. 2. raise exception (args)
...
What is the purpose of the -m switch?
...
@arifwn Running Python3 requires a slight update as python -m http.server and this is still awesome!
– Kit Roed
Feb 16 '16 at 15:32
...
来自微软的一手内幕：Windows 10是怎么出炉的 - 创意 - 清泛网 - 专注C/C++及内核技术
...它们整合到一起。不过这不意味着亦可以直接通过Xbox One下载各种应用程序。“想要在一个商店里就享受到所有的内容的话，可能还得再等等。”Spencer说，明年Windows 10的应用可以在Xbox One上运行的时候我们就等到头了。
另外...
Is there a difference between “==” and “is”?
...rt sys;tt=sys.argv[1];print(tt is "foo", tt == "foo", id(tt)==id("foo"))'| python3 - foo output: False True False.
– ahuigo
Jul 23 '18 at 12:38
...
App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...浏览带端口url的页面，这款拓展统统解决。
.aix 拓展下载：
cn.fun123.CustomWebView.aix
基础使用方法：
例如，使用此拓展访问 react 写的网页，效果如下：
而使用原生的Web浏览器则无法访问：
属性
AdHo...
What are the differences between the threading and multiprocessing modules?
...other Python inefficiencies coming into play.
Test code:
#!/usr/bin/env python3
import multiprocessing
import threading
import time
import sys
def cpu_func(result, niters):
'''
A useless CPU bound function.
'''
for i in range(niters):
result = (result * result * i + 2 * ...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...the key phrase "if y has any non-string keys." That's what doesn't work in Python3; the fact that it works in CPython 2 is an implementation detail that can't be relied on. IFF all your keys are guaranteed to be strings, this is a fully supported option.
– Carl Meyer
...
How to deal with SettingWithCopyWarning in Pandas?
...['A']]
df2['A'] /= 2
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/IPython/__main__.py:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
df2
A
0 2.5
1 4.5
2 3...