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Setting the selected value on a Django forms.ChoiceField
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How to keep a Python script output window open?
...ave a few options:
Run the program from an already-open terminal. Open a command prompt and type:
python myscript.py
For that to work you need the python executable in your path. Just check on how to edit environment variables on Windows, and add C:\PYTHON26 (or whatever directory you installed...
How to change the name of a Django app?
...s.py files.
Edit the database table django_content_type with the following command: UPDATE django_content_type SET app_label='<NewAppName>' WHERE app_label='<OldAppName>'
Also if you have models, you will have to rename the model tables. For postgres use ALTER TABLE <oldAppName>_m...
What is the maximum recursion depth in Python, and how to increase it?
...increase the limit both in the sys and the resource modules: stackoverflow.com/a/16248113/205521
– Thomas Ahle
Apr 28 '14 at 19:10
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Open an IO stream from a local file or url
...ile_contents = open('local-file.txt') { |f| f.read }
web_contents = open('http://www.stackoverflow.com') {|f| f.read }
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How can I check for Python version in a program that uses new language features?
...ontrol early enough, you could split it into different .py files and check compatibility in the main file before importing (e.g. in __init__.py in a package):
# __init__.py
# Check compatibility
try:
eval("1 if True else 2")
except SyntaxError:
raise ImportError("requires ternary support")
# ...
What is the proper way to re-attach detached objects in Hibernate?
... Dec 14 '10 at 10:50
mikhailfrancomikhailfranco
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Concurrent HashSet in .NET Framework?
...ortunately. However, there are some workarounds.
ConcurrentDictionary (recommended)
This first one is to use the class ConcurrentDictionary<TKey, TValue> in the namespace System.Collections.Concurrent. In the case, the value is pointless, so we can use a simple byte (1 byte in memory).
pri...
Example for boost shared_mutex (multiple reads/one write)?
...(This has been discussed elsewhere but the most interesting thread is here http://thread.gmane.org/gmane.comp.lib.boost.devel/214394)
However I did find an important (undocumented) difference between a thread waiting for an upgrade to a lock (ie needs to wait for all readers to release the shared l...
How to apply a function to two columns of Pandas dataframe
...orry about order changing, or get the index by name e.g. see stackoverflow.com/questions/13021654/…
– Davos
Mar 22 '18 at 7:19
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