大约有 1,800 项符合查询结果（耗时：0.0175秒） [XML]
How to import a module given its name as string?
...
With Python older than 2.7/3.1, that's pretty much how you do it.
For newer versions, see importlib.import_module for Python 2 and and Python 3.
You can use exec if you want to as well.
Or using __import__ you can import a list of modules by do...
一文了解大数据领域创业的机会与方向 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
一文了解大数据领域创业的机会与方向跨界和融合是大数据思维里最重要的一环，大数据就像是钱一样，你得让它流动起来才能产生价值。在这篇大数据行业的SWOT分析文章中，也许可以找到你想了解的大数据行业创业环境、问...
How to print number with commas as thousands separators?
...
Locale unaware
'{:,}'.format(value) # For Python ≥2.7
f'{value:,}' # For Python ≥3.6
Locale aware
import locale
locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8'
'{:n}'.format(value) # For Python ≥2.7
f'{value:n}' # For Python ...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...TER DATABASE <database_name> CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change table collation:
ALTER TABLE <table_name> CONVERT TO CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change column collation:
ALTER TABLE <table_name> MODIFY <column_name> VARCHAR(255) CHARACT...
Store query result in a variable using in PL/pgSQL
...on't leave out the table name prefix on test_table.name or you'll get complaints about an ambiguous reference.
share
|
improve this answer
|
follow
|
...
How can I determine the URL that a local Git repository was originally cloned from?
...
With Git 2.7 (release January 5th, 2015), you have a more coherent solution using git remote:
git remote get-url origin
(nice pendant of git remote set-url origin <newurl>)
See commit 96f78d3 (16 Sep 2015) by Ben Boeckel (ma...
Python JSON serialize a Decimal object
...was running Python 2.6.5 and it worked fine. However, I upgraded to Python 2.7 and it stopped working. I tried to think of some sort of way to encode Decimal objects and this is what I came up with:
import decimal
class DecimalEncoder(json.JSONEncoder):
def default(self, o):
if isinsta...
Relative imports in Python 2.7
... idea here is this (and note that these all function the same across python2.7 and python 3.x):
If run as import lib or from lib import foo as a regular package import from ordinary code, __package is lib and __name__ is lib.foo. We take the first code path, importing from .fileA, etc.
If run as ...
Generate a random date between two other dates
... results in the total seconds. The total_seconds() method is new in python 2.7 and didn't exist back in 2009 when I answered the question. If you have python 2.7 you should use that instead, but the code works fine as it is.
– nosklo
Nov 22 '11 at 11:12
...
mysql_config not found when installing mysqldb python interface
...,'beta',4) -D__version__=1.2.4b4 -I/usr/include/mysql -I/usr/include/python2.7 -c _mysql.c -o build/temp.linux-x86_64-2.7/_mysql.o -DBIG_JOINS=1 -fno-strict-aliasing -g
In file included from _mysql.c:44:0:
/usr/include/mysql/my_config.h:422:0: aviso: se redefinió "HAVE_WCSCOLL" [act...