Category: Python

Parameters of detectMultiScale in OpenCV using Python

Each Answer to this Q is separated by one/two green lines. I am not able to understand the parameters passed to detectMultiScale. I know that the general syntax is detectMultiScale(image, rejectLevels, levelWeights) However, what...

Python.h: No such file or directory

Each Answer to this Q is separated by one/two green lines. I recently installed KDevelop 4 for C++ development on my Macbook Pro running Ubuntu 12.04 LTS. I want to embed Python application in...

Appending two dataframes with same columns, different order

Each Answer to this Q is separated by one/two green lines. I have two pandas dataframes. noclickDF = DataFrame([[0, 123, 321], [0, 1543, 432]], columns=[‘click’, ‘id’, ‘location’]) clickDF = DataFrame([[1, 123, 421], [1, 1543,...

Colorbar for matplotlib plot_surface command

Each Answer to this Q is separated by one/two green lines. I have modified the mplot3d example code for my application with Paul’s help. The code reads: from mpl_toolkits.mplot3d import Axes3D import matplotlib.pyplot as...

how to multiply multiple columns by a column in Pandas

Each Answer to this Q is separated by one/two green lines. I would like to have: df[[‘income_1’, ‘income_2’]] * df[‘mtaz_proportion’] return those columns multiplied by df[‘mtaz_proportion’] so that I can set df[[‘mtaz_income_1’, ‘mtaz_income_2’]] =...

Django: How to get a time difference from the time post?

Each Answer to this Q is separated by one/two green lines. Say I have a class in model class Post(models.Model): time_posted = models.DateTimeField(auto_now_add=True, blank=True) def get_time_diff(self): timediff = timediff = datetime.datetime.now() – self.time_posted print...