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Make sure only a single instance of a program is running
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The following code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version ...
In Django, how does one filter a QuerySet with dynamic field lookups?
...d to solve this problem:
kwargs = {
'{0}__{1}'.format('name', 'startswith'): 'A',
'{0}__{1}'.format('name', 'endswith'): 'Z'
}
Person.objects.filter(**kwargs)
This is a very common and useful Python idiom.
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How to set default value to the input[type=“date”] [duplicate]
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The date should take the format YYYY-MM-DD. Single digit days and months should be padded with a 0. January is 01.
From the documentation:
A string representing a date.
Value: A valid full-date as defined in [RFC 3339], with the additional qualification that the year c...
Can I mix MySQL APIs in PHP?
...r. They are separate APIs and the resources they create are incompatible with one another.
There is a mysqli_close, though.
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std::string formatting like sprintf
I have to format std::string with sprintf and send it into file stream. How can I do this?
40 Answers
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Function for Factorial in Python
... 2.6 and above):
import math
math.factorial(1000)
If you want/have to write it yourself, you can use an iterative approach:
def factorial(n):
fact = 1
for num in range(2, n + 1):
fact *= num
return fact
or a recursive approach:
def factorial(n):
if n < 2:
re...
Where IN clause in LINQ [duplicate]
...follow
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edited Dec 17 '12 at 17:54
answered Jun 6 '09 at 14:37
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How to remove constraints from my MySQL table?
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edited Sep 30 '13 at 10:42
answered Jan 2 '13 at 12:35
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Using sections in Editor/Display templates
...body tag in my master layout page and just wondering the best to go about it, MVC style.
8 Answers
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Where does Chrome store extensions?
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Storage Location for Unpacked Extensions
Extension engine does not explicitly change their location or add a reference to its local paths, they are left in the place where there are selected from in all Operating Systems.
Ex: If i load a unpacked Extension from E:\Chrome Extension the unpacked Ex...