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What is __future__ in Python used for and how/when to use it, and how it works
...introducing new keywords.
E.g., for using context managers, you had to do from __future__ import with_statement in 2.5, as the with keyword was new and shouldn't be used as variable names any longer. In order to use with as a Python keyword in Python 2.5 or older, you will need to use the import fr...
How to assert output with nosetest/unittest in python?
...on't have to write setup and teardown functions just for this.
import sys
from contextlib import contextmanager
from StringIO import StringIO
@contextmanager
def captured_output():
new_out, new_err = StringIO(), StringIO()
old_out, old_err = sys.stdout, sys.stderr
try:
sys.stdo...
Threading pool similar to the multiprocessing Pool?
...t is hidden somewhat and not properly documented.
It can be imported via
from multiprocessing.pool import ThreadPool
It is implemented using a dummy Process class wrapping a python thread. This thread-based Process class can be found in multiprocessing.dummy which is mentioned briefly in the do...
Knight's Shortest Path on Chessboard
...found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
function Dijkstra(Graph, source):
for each vertex v in Graph: // Initializations
dist[v] := infinity // Unknown distance function from source to v
previous[v] := ...
How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...h client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? How does this work?
...
What is cURL in PHP?
... or higher. In PHP
4.2.3, you will need libcurl version 7.9.0 or higher. From PHP 4.3.0, you will need a libcurl version that's
7.9.8 or higher. PHP 5.0.0 requires a libcurl version 7.10.5 or greater.
You can make HTTP requests without cURL, too, though it requires allow_url_fopen to be enabl...
pythonw.exe or python.exe?
...
Running a .pyw file from Notepad++ I still get a console window. To prevent this I have to double-click the file name to open the app. Only then do I see just the GUI and no console.
– Luther
Jul 28 at 6:54...
“From View Controller” disappears using UIViewControllerContextTransitioning
...at's fine. I'm not sure what would happen if you presented your controller from within an already presented modal controller, so for more complex cases, you'll have to experiment around.
share
|
im...
How to automate createsuperuser on django?
...ferent user model. A more generic way to create the user would be:
echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('admin', 'admin@myproject.com', 'password')" | python manage.py shell
ORIGINAL ANSWER
Here there is a simple version of...
Running Bash commands in Python
...
Don't use os.system. It has been deprecated in favor of subprocess. From the docs: "This module intends to replace several older modules and functions: os.system, os.spawn".
Like in your case:
bashCommand = "cwm --rdf test.rdf --ntriples > test.nt"
import subprocess
process = subprocess....