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Non-alphanumeric list order from os.listdir()
...subdirectories: run01, run02, ... run19, run20, and then I generate a list from the following command:
12 Answers
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Difference between Destroy and Delete
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Basically destroy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
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Where does this come from: -*- coding: utf-8 -*-
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This way of specifying the encoding of a Python file comes from PEP 0263 - Defining Python Source Code Encodings.
It is also recognized by GNU Emacs (see Python Language Reference, 2.1.4 Encoding declarations), though I don't know if it was the first program to use that syntax.
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Reimport a module in python while interactive
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This should work:
reload(my.module)
From the Python docs
Reload a previously imported module. The argument must be a module object, so it must have been successfully imported before. This is useful if you have edited the module source file using an external...
What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
...below).
You can read more in the Mozilla documentation on arrow functions.
From the Mozilla documentation:
An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically binds the this value (does not bind its own this, arguments,...
How to exit from PostgreSQL command line utility: psql
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cntrl+D to exit from any where
– vidur punj
Jan 22 '18 at 14:41
1
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How should I structure a Python package that contains Cython code
...Here is a cut-down version of setup.py which I hope shows the essentials:
from distutils.core import setup
from distutils.extension import Extension
try:
from Cython.Distutils import build_ext
except ImportError:
use_cython = False
else:
use_cython = True
cmdclass = {}
ext_modules = [...
Split views.py in several files
...w1(arg):
pass
viewsb.py :
def view2(arg):
pass
__init__.py :
from viewsa import view1
from viewsb import view2
The quick explanation would be: when you write from views import view1 Python will look for view1 in
views.py, which is what happens in the first (original) case
views/_...
Why doesn't Java allow to throw a checked exception from static initialization block?
Why doesn't Java allow to throw a checked exception from a static initialization block? What was the reason behind this design decision?
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remove None value from a list without removing the 0 value
...n't recommend this code - it's just for scientific purposes)
>>> from operator import is_not
>>> from functools import partial
>>> L = [0, 23, 234, 89, None, 0, 35, 9]
>>> filter(partial(is_not, None), L)
[0, 23, 234, 89, 0, 35, 9]
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