Python

how to insert some text in all django context using django middleware

this my middleware code : this is the settings.py: and the view is : the html is : but it not show {{ss}}: so how do i show : how to insert some text in all django context using django middleware, so that i cant use to insert the text everytime , thanks Answer To meet your initial goal, I

decorating decorators: try to get my head around understanding it

decorator python

I’m trying to understand how to decorate decorators, and wanted to try out the following: Let’s say I have two decorators and apply them to the function hello(): Then I have to start adding other decorators for other functions, but in general the @wrap decorator will “wrap all of them” How do I write a decorator, which decorates my @lower

Vectorize over the rows of an array

numpy python vectorization

I have an array X and I want to apply a function f to all the rows of X: Now, y should be array([15,30], ‘i’). Which method or slicing magic will implement rows in the most efficient way? Answer NumPy implements the concept of “action over a particular axis”. The general function is numpy.apply_along_axis(): (where sum can of course be

Automatically-generated Python constructor

code-generation constructor data-members python

I have countless Python classes from various projects from SQLAlchemy (and a couple from Pygame as well), and I recently noticed a pattern in many of them: their constructors always went something like this: … whereby the only thing the constructor did was to transfer a set of positional arguments into an exactly identically named set of data members, performing

How do I remove all zero elements from a NumPy array?

arrays filtering numpy python

I have a rank-1 numpy.array of which I want to make a boxplot. However, I want to exclude all values equal to zero in the array. Currently, I solved this by looping the array and copy the value to a new array if not equal to zero. However, as the array consists of 86 000 000 values and I have

Prepend line to beginning of a file

python

I can do this using a separate file, but how do I append a line to the beginning of a file? This starts writing from the end of the file since the file is opened in append mode. Answer In modes ‘a’ or ‘a+’, any writing is done at the end of the file, even if at the current moment

In Python on Unix, determine if I am using my computer? or idle?

keyboard networking python python-idle

I would like to write a script to do an heavy network upload, in the background. However, I would like it to pause when I am using my computer (either by detecting network activity or keyboard activity or that I am not idle). What is the best way to detect that I am using the computer, on Python on Unix?

Recursive diff of two dictionaries (keys and values)?

data-structures dictionary diff python recursion

So I have a python dictionary, call it d1, and a version of that dictionary at a later point in time, call it d2. I want to find all the changes between d1 and d2. In other words, everything that was added, removed or changed. The tricky bit is that the values can be ints, strings, lists, or dicts, so

Django DateTimeField auto_now_add not working

datetime django model python

In one of the model i have set one timestamp field as follows: While in shell i am able to create a obj and save it, however in my application it is raising a exception that created_datetime field cannot be null. Confused where things went wrong!! How to reslove it. Answer You can do something like this

Python: How do I display a timer in a terminal

python timer

I’m new to python programming and using ubuntu to do so. In a program I have done I used a delay of 1 minute until it executes the code again. How can I program a timer to be displayed in the terminal based on the value of the delayed time? Thanks in advance… Answer The simplest way is as follows.