I’m trying to translate some Matlab code into Python (using NumPy). I’m not very familiar with Matlab, and I’ve encountered a line that I’m having trouble parsing: I’d hazard a guess that a p-long head of x is being used as indices to select p entries of w, and that those entries…
Tag: python
Python assigning multiple variables to same value? list behavior
I tried to use multiple assignment as show below to initialize variables, but I got confused by the behavior, I expect to reassign the values list separately, I mean b[0] and c[0] equal 0 as before. Result is: [1, 3, 5] [1, 3, 5] [1, 3, 5] Is that correct? what should I use for multiple assignment? what is di…
Python: How to not print comma in last element in a for loop?
My code iterates over a set and print actor’s names: The result looks like: But I want it to detect the last element so that it won’t print the last comma. The result should be instead: How can I do that? Answer
is not JSON serializable
I have the following ListView But I get following error: Any ideas ? Answer It’s worth noting that the QuerySet.values_list() method doesn’t actually return a list, but an object of type django.db.models.query.ValuesListQuerySet, in order to maintain Django’s goal of lazy evaluation, i.e. th…
How to add an empty column to a dataframe?
What’s the easiest way to add an empty column to a pandas DataFrame object? The best I’ve stumbled upon is something like Is there a less perverse method? Answer If I understand correctly, assignment should fill:
How to read a whole file in Python? To work universally in command line
How to read a whole file in Python? I would like my script to work however it is called script.py log.txt script.py < log2.txt python script.py < log2.txt python -i script.py logs/yesterday.txt You get the idea. I tried But I get Answer Instead of using fileinput, open the file directly yourself:
Disable webcam’s Autofocus in Linux
I’m working in embebed system in the beagleboard. The source code is in Python, but I import libraries from OpenCV to do image processing. Actually, I’m using the webcam Logitech c910, it’s a excellent camera but it has autofocus. I would like to know if I can disable the autofocus from Pyth…
Writing a loop with a step size 10, to print out all 2-digit numbers ending in 7 in increasing order in python
Write a program, using a for loop with step size 10, to print out all 2-digit numbers which end in 7, in increasing order I have no idea where to start, or how to do this. help please! Answer range range(stop) range(start, stop[, step])
Converting BLOB, stored on a database, to an image on an HTML website
This is my first question. I am having users upload their own image to a database. That image is stored as a BLOB. I was able to do this successfully. I am using MySQL for the database. The part I am having trouble with is displaying that BLOB as an image on the website when its called upon. Right now
UserWarning: converting a masked element to nan
Executing a python script (way to long to include here) I wrote leads to a warning message. I don’t know at which line in my code this gets raised. How can I get this information? Furthermore, what does this mean exactly? In fact, I didn’t know I was using a masked array of some sort? Answer You c…