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How to calculate number of days between two given dates?
...= (b-a)
print delta.days
For reference: http://arrow.readthedocs.io/en/latest/
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Accessing dict_keys element by index in Python3
...
Call list() on the dictionary instead:
keys = list(test)
In Python 3, the dict.keys() method returns a dictionary view object, which acts as a set. Iterating over the dictionary directly also yields keys, so turning a dictionary into a list results in a list of all the keys...
How to debug a bash script? [closed]
...teresting
https://github.com/koalaman/shellcheck
A little example:
$ cat test.sh
ARRAY=("hello there" world)
for x in $ARRAY; do
echo $x
done
$ shellcheck test.sh
In test.sh line 3:
for x in $ARRAY; do
^-- SC2128: Expanding an array without an index only gives the first element.
...
Importing modules from parent folder
....py
I call the . the root folder, and in my case it is located in C:\tmp\test_imports.
Steps
1) Add a setup.py to the root folder
The contents of the setup.py can be simply
from setuptools import setup, find_packages
setup(name='myproject', version='1.0', packages=find_packages())
Basically...
Python argparse: default value or specified value
...nargs='?', const=1, type=int)
args = parser.parse_args()
print(args)
% test.py
Namespace(example=None)
% test.py --example
Namespace(example=1)
% test.py --example 2
Namespace(example=2)
nargs='?' means 0-or-1 arguments
const=1 sets the default when there are 0 arguments
type=int converts ...
In Django, how do I check if a user is in a certain group?
...']).exists()
Note that those functions can be used with the @user_passes_test decorator to manage access to your views :
from django.contrib.auth.decorators import login_required, user_passes_test
@login_required
@user_passes_test(is_member) # or @user_passes_test(is_in_multiple_groups)
def myvie...
Using os.walk() to recursively traverse directories in Python
...
┃ ┣━modules.xml
┃ ┣━vcs.xml
┃ ┗━workspace.xml
┣━[test1]
┃ ┗━test1.txt
┣━[test2]
┃ ┣━[test2-2]
┃ ┃ ┗━[test2-3]
┃ ┃ ┣━test2
┃ ┃ ┗━test2-3-1
┃ ┗━test2
┣━folder_tree_maker.py
┗━tree.py
...
What are the differences between the threading and multiprocessing modules?
...on for this, there must be other Python inefficiencies coming into play.
Test code:
#!/usr/bin/env python3
import multiprocessing
import threading
import time
import sys
def cpu_func(result, niters):
'''
A useless CPU bound function.
'''
for i in range(niters):
result = ...
How to suppress Update Links warning?
...4 virtual machine powered by VMWare (this is usual routine for my everyday testing tasks, so I have many of them deployed).
Then, I changed only the following Excel options (i.e. all the other are left as is after installation):
Advanced > General > Ask to update automatic links checked:
...
Mocha / Chai expect.to.throw not catching thrown errors
I'm having issues getting Chai's expect.to.throw to work in a test for my node.js app. The test keeps failing on the thrown error, but If I wrap the test case in try and catch and assert on the caught error, it works.
...