Python

Is there a better more readable way to coalese columns in pandas

I often need a new column that is the best I can achieve from other columns and I have a specific list of preference priorities. I am willing to take the first non null value. Results this code works (and the result are what I want) but it is not very fast. I get to pick my priorities if I

Pandas: Assign Datetime object to time intervals

datetime pandas python

I’m trying to create a new variable in which datetime64[ns] objects are assigned to 5 minute intervals. The new interval variable should span every 5 minute period from 00:00 to 23:55. The criteria for assignment is whether the time of the datetime64[ns] object falls within the corresponding 5 min inter…

nan in interp1d scipy

matlab python

I have the following code that I am working on in python with interp1d and it seems that the output of the interp1d times the query points outputs the beginning values of array as NaN. Why? The first 20 values in WdB are : The following is the same outputted in maltab for the first 20 values: How can I

asyncio: Wait for event from other thread

events python python-asyncio python-multithreading

I’m designing an application in Python which should access a machine to perform some (lengthy) tasks. The asyncio module seems to be a good choice for everything that is network-related, but now I need to access the serial port for one specific component. I’ve implemented kind of an abstraction la…

How to use KDE Okular’s document view widget in a Python Qt app?

kde-plasma okular pykde pyqt python

I am writing a desktop application in Python (3.4) on Linux using Qt (4.8) and PyQt. Is there a way to use/import Okular’s pdf view functionality as a widget? If yes, how? Answer This works for me:

Django NOT NULL constraint failed userprofile.user_id in case of uploading a file

django python

I am trying to practice a simple project: A user registers (using Django registration-redux), uploads some file, and then s/he is provided with a list of her files, being downloadable. Here are my models.py, forms.py, and views respectively: models.py forms.py view.py however when I login with a user and try …

Add an image in a specific position in the document (.docx)?

image python python-2.7 python-docx

I use Python-docx to generate Microsoft Word document.The user want that when he write for eg: “Good Morning every body,This is my %(profile_img)s do you like it?” in a HTML field, i create a word document and i recuper the picture of the user from the database and i replace the key word %(profile…

How do I list the files inside a python wheel?

package python python-packaging python-wheel

I’m poking around the various options to setup.py for including non-python files, and they’re somewhat less than intuitive. I’d like to be able to check the package generated by bdist_wheel to see what’s actually in it–not so much to make sure that it will work (that’s what…

How to stop an infinite loop safely in Python?

infinite-loop python

I’ve got a script that runs an infinite loop and adds things to a database and does things that I can’t just stop halfway through, so I can’t just press Ctrl+C and stop it. I want to be able to somehow stop a while loop, but let it finish it’s last iteration before it stops. Let me cla…