How to extend an array in-place in Numpy?
Currently, I have some code like this
python
Safe way to parse user-supplied mathematical formula in Python
Is there a math expressions parser + evaluator for Python?
What is the pythonic way to detect the last element in a ‘for’ loop?
I’d like to know the best way (more compact and “pythonic” way) to do a special treatment for the last element in a for loop. There is a piece of code that should be called only between elements, being suppressed in the last one.
What is the correct syntax for ‘else if’?
I’m a new Python programmer who is making the leap from 2.6.4 to 3.1.1. Everything has gone fine until I tried to use the ‘else if’ statement. The interpreter gives me a syntax error after the ‘if’ in ‘else if’ for a reason I can’t seem to figure out.
Open PIL image from byte file
I have this image with size 128 x 128 pixels and RGBA stored as byte values in my memory. But
How to assign a variable in an IF condition, and then return it?
def isBig(x): if x > 4: return 'apple' else: return 'orange' This works: if isBig(y): return isBig(y) This does NOT work: if fruit = isBig(y): return fruit Why doesn’t the 2nd one work!? I want a 1-liner. Except, the 1st one will call the function TWICE. How to make it 1 liner, without calling the … Read more
Better way to shuffle two numpy arrays in unison
I have two numpy arrays of different shapes, but with the same length (leading dimension). I want to shuffle each of them, such that corresponding elements continue to correspond — i.e. shuffle them in unison with respect to their leading indices.
matplotlib: plot multiple columns of pandas data frame on the bar chart
I am using the following code to plot a bar-chart:
return SQL table as JSON in python
I’m playing around with a little web app in web.py, and am setting up a url to return a JSON object. What’s the best way to convert a SQL table to JSON using python?
How to enable Pan and Zoom in a QGraphicsView
I am using python and Qt Designer to implement loading tiff images and to enable Pan and Zoom on some mouse event (wheel – zoom, press wheel – pan).