Using python map and other functional tools
This is quite n00bish, but I’m trying to learn/understand functional programming in python. The following code:
Python
Nested inlines in the Django admin?
Alright, I have a fairly simple design.
Python split for lists
If we have a list of strings in python and want to create sublists based on some special string how should we do?
How do I specify a range of unicode characters
How do I specify a range of unicode characters from ' ' (space) to u00D7FF?
Convolving image with kernel in Fourier domain
I’m using zero padding around my image and convolution kernel, converting them to the Fourier domain, and inverting them back to get the convolved image, see code below. The result, however, is wrong. I was expecting a blurred image, but the output is four shifted quarters. Why is the output wrong, and how can I fix the code?
Searching a sequence in a NumPy array
Let’s say I have the following array :
How to run a background process and do *not* wait?
My goal is simple: kick off rsync and DO NOT WAIT.
Python multithreaded print statements delayed until all threads complete execution
I have a piece of code below that creates a few threads to perform a task, which works perfectly well on its own. However I’m struggling to understand why the print statements I call in my function do not execute until all threads complete and the print 'finished' statement is called. I would expect them to be called as the thread executes. Is there any simple way to accomplish this, and why does this work this way in the first place?
How to embed image or picture in jupyter notebook, either from a local machine or from a web resource?
I would like to include image in a jupyter notebook.
Which is the fastest way to extract day, month and year from a given date?
I read a csv file containing 150,000 lines into a pandas dataframe. This dataframe has a field, Date, with the dates in yyyy-mm-dd format. I want to extract the month, day and year from it and copy into the dataframes’ columns, Month, Day and Year respectively. For a few hundred records the below two methods work ok, but for 150,000 records both take a ridiculously long time to execute. Is there a faster way to do this for 100,000+ records?