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What is the difference between a 'closure' and a 'lambda'?
...ten as binding a lambda to a variable internally. In other languages, like Python, there are some (rather needless) distinctions between them, but they behave the same way otherwise.
A closure is any function which closes over the environment in which it was defined. This means that it can access v...
How do I use floating-point division in bash?
... 1/3 | node -p
octave
echo 1/3 | octave
perl
echo print 1/3 | perl
python2
echo print 1/3. | python2
python3
echo 'print(1/3)' | python3
R
echo 1/3 | R --no-save
with cleaned up output:
echo 1/3 | R --vanilla --quiet | sed -n '2s/.* //p'
ruby
echo print 1/3.0 | ruby
wcalc
ech...
Profiling Django
..., and if my profiling middleware notices that a flag has been set, it uses Python's hotshot module like this:
def process_view(self, request, view_func, view_args, view_kwargs):
# setup things here, along with: settings.DEBUG=True
# to get a SQL dump in connection.queries
profiler...
Using global variables between files?
...
See Python's document on sharing global variables across modules:
The canonical way to share information across modules within a single program is to create a special module (often called config or cfg).
config.py:
...
How do you normalize a file path in Bash?
...
A portable and reliable solution is to use python, which is preinstalled pretty much everywhere (including Darwin). You have two options:
abspath returns an absolute path but does not resolve symlinks:
python -c "import os,sys; print(os.path.abspath(sys.argv[1]))" ...
How can you get the SSH return code using Paramiko?
...%s" % chan.recv_exit_status()
client.close()
Example of its execution:
$ python sshtest.py
Password:
Command to run: true
running 'true'
exit status: 0
Command to run: false
running 'false'
exit status: 1
Command to run:
$
...
Titlecasing a string with exceptions
Is there a standard way in Python to titlecase a string (i.e. words start with uppercase characters, all remaining cased characters have lowercase) but leaving articles like and , in , and of lowercased?
...
Should import statements always be at the top of a module?
... longer. Actually, I think this cost is only paid for once. I've read that Python caches an imported module so that there is only minimal cost for importing it again.
– moltenform
Sep 25 '08 at 1:45
...
How to find all the subclasses of a class given its name?
...ng approach of getting all classes that are inherited from a base class in Python.
10 Answers
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Check if key exists and iterate the JSON array using Python
I have a bunch of JSON data from Facebook posts like the one below:
7 Answers
7
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