Python modulo on floats
Can anyone explain how the modulo operator works in Python?
I cannot understand why 3.5 % 0.1 = 0.1.
python
Plotting a 2D heatmap with Matplotlib
Using Matplotlib, I want to plot a 2D heat map. My data is an n-by-n Numpy array, each with a value between 0 and 1. So for the (i, j) element of this array, I want to plot a square at the (i, j) coordinate in my heat map, whose color is proportional to the element’s value in the array.
What is the difference between drawing plots using plot, axes or figure in matplotlib?
I’m kind of confused what is going at the backend when I draw plots in matplotlib, tbh, I’m not clear with the hierarchy of plot, axes and figure. I read the documentation and it was helpful but I’m still confused…
pandas select from Dataframe using startswith
This works (using Pandas 12 dev)
Automatically import modules when entering the python or ipython interpreter
I find myself typing import numpy as np almost every single time I fire up the python interpreter. How do I set up the python or ipython interpreter so that numpy is automatically imported?
Finding multiple occurrences of a string within a string in Python
How do I find multiple occurrences of a string within a string in Python? Consider this: >>> text = "Allowed Hello Hollow" >>> text.find("ll") 1 >>> So the first occurrence of ll is at 1 as expected. How do I find the next occurrence of it? Same question is valid for a list. Consider: >>> … Read more
String formatting in Python 3
I do this in Python 2:
Pandas Extract Number from String
Given the following data frame:
Reconstruct a categorical variable from dummies in pandas
pd.get_dummies allows to convert a categorical variable into dummy variables. Besides the fact that it’s trivial to reconstruct the categorical variable, is there a preferred/quick way to do it?
Python/NumPy first occurrence of subarray
In Python or NumPy, what is the best way to find out the first occurrence of a subarray?