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Why is there no tuple comprehension in Python?
... is tuple([generator]).
Performance Comparison
List comprehension:
$ python3 -m timeit "a = [i for i in range(1000)]"
10000 loops, best of 3: 27.4 usec per loop
Tuple from list comprehension:
$ python3 -m timeit "a = tuple([i for i in range(1000)])"
10000 loops, best of 3: 30.2 usec per loop...
List comprehension vs map
...CAN BE LAZY, and in fact is lazy in python. That means you can do this (in python3) and your computer will not run out of memory and lose all your unsaved data:
>>> map(str, range(10**100))
<map object at 0x2201d50>
Try doing that with a list comprehension:
>>> [str(n) fo...
What are good uses for Python3's “Function Annotations”
Function Annotations: PEP-3107
12 Answers
12
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Visual Studio 2013 Update 4【VS2013 SP4 旗舰版下载地址】 - 更多技术 - ...
Visual Studio 2013 Update 4【VS2013 SP4 旗舰版下载地址】vs2013没有64位版本，但是提供64位编译器，可以编译64位程序。Visual Studio Ultimate 2013 with Update 4 (x86) - DVD (Chinese...vs2013没有64位版本，但是提供64位编译器，可以编译64位程序。
Visu...
How can I connect to MySQL in Python 3 on Windows?
...as it is a fork
Debian and Ubuntu use it to provide both python-mysqldb andpython3-mysqldb packages.
benchmarks here: https://github.com/methane/mysql-driver-benchmarks
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How do I parse an ISO 8601-formatted date?
...Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3.4/_strptime.py", line 500, in _strptime_datetime
tt, fraction = _strptime(data_string, format)
File "/usr/lib/python3.4/_strptime.py", line 337, in _strptime
(data_string, format))
ValueError: time data '200...
Print a string as hex bytes?
...
Note that in python3, the concept of printing a str as hex doesn't really make sense; you'll want to print bytes object as hex (convert str to bytes by calling .encode()).
– mic_e
May 8 '15 at 12:53
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Adobe Photoshop CS6 for Mac (支持Retina屏) 简体中文破解版 - 软件下载 -...
...产品——Adobe PhotoShop CS6 ，所有感兴趣的用户都可以免费下载试用。
此次发布的PS CS6 包括大量优化和调整以及在CS5基础上的一些小升级。最直观的变化要数CS6的整体色调改成更深的灰黑色，按Adobe的说法是为了让用户把注意力...
App Inventor 2 FTP 上传下载全方案总结 · App Inventor 2 中文网
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App Inventor 2 FTP 上传下载全方案总结
KIO FTPCliente
TaifunFTP （收费的:$12，请自行研究）
FTPClient （收费的:$5，请自行研究）
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离线版手动下载安装最新升级包 - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
正常情况下，软件会自动下载升级包，自动安装。但是有时候下载升级包等可能会失败，这时，可以自行下载最新升级包，点击安装，安装路径会自动探测，无需修改，直接下一步、下一步，也是非常的简单的。
如遇自动升...