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How to express a One-To-Many relationship in Django
...E)
if we want to get the list of wheels of particular car. we will use python's auto generated object wheel_set. For car c you will use c.wheel_set.all()
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Turn a string into a valid filename?
...want to remove all characters that wouldn't be allowed in filenames, using Python.
23 Answers
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How to get CRON to call in the correct PATHs
I'm trying to get cron to call in the correct PATHs. When I run a Python script from shell the script runs fine as it uses the PATHs set in bashrc but when I use cron all the PATHs are not used from bashrc. Is there a file I can enter the PATHs into for cron like bashrc or a way to call the PATHs fr...
How to jump to a particular line in a huge text file?
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linecache:
The linecache module allows one to get any line from a Python source file, while attempting to optimize internally, using a cache, the common case where many lines are read from a single file. This is used by the traceback module to retrieve source lines for inclusion in the form...
Piping buffer to external command in Vim
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This is useful to format json like: :'<,'>!python -mjson.tool or :%!python -mjson.tool
– TrinitronX
Nov 14 '13 at 23:14
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JavaScript curry: what are the practical applications?
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I found functions that resemble python's functools.partial more useful in JavaScript:
function partial(fn) {
return partialWithScope.apply(this,
Array.prototype.concat.apply([fn, this],
Array.prototype.slice.call(arguments, 1)));
}
function pa...
TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...but with transaction.atomic() and TransactionTestCase didn't work for me.
python manage.py test -r instead of python manage.py test is ok for me, maybe the order of execution is crucial
then i find a doc about Order in which tests are executed, It mentions which test will run first.
So, i use Tes...
D Programming Language in the real world? [closed]
...n, a monitor object for each class, runtime type info, etc.
Unlike Ruby, Python, PHP, etc, D tries to be almost as fast as C, even if it is less dynamic and slightly more difficult to program in than scripting languages.
The result is a language that is optimal when both development time and execu...
How to convert a negative number to positive?
How can I convert a negative number to positive in Python? (And keep a positive one.)
6 Answers
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Append value to empty vector in R?
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FWIW: analogous to python's append():
b <- 1
b <- c(b, 2)
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