How to spread a column in a Pandas data frame
I have the following pandas data frame:
Python
How can I install PIL on mac os x 10.7.2 Lion
I’ve tried googling & looking up some other people’s questions. However, I still couldn’t find a clear/simple recipe to install PIL (for python 2.6 or 2.7) on mac os x 10.7.2 Lion.
PIL and pygame.image
I had opened an image using PIL, as
What is the best approach to change primary keys in an existing Django app?
I have an application which is in BETA mode. The model of this app has some classes with an explicit primary_key. As a consequence Django use the fields and doesn’t create an id automatically.
Get formula from Excel cell with python xlrd
I have to port an algorithm from an Excel sheet to python code but I have to reverse engineer the algorithm from the Excel file.
Remove all newlines from inside a string
I’m trying to remove all newline characters from a string. I’ve read up on how to do it, but it seems that I for some reason am unable to do so. Here is step by step what I am doing:
How to enumerate a range of numbers starting at 1
I am using Python 2.5, I want an enumeration like so (starting at 1 instead of 0):
How can I quickly estimate the distance between two (latitude, longitude) points?
I want to be able to get a estimate of the distance between two (latitude, longitude) points. I want to undershoot, as this will be for A* graph search and I want it to be fast. The points will be at most 800 km apart.
Sum array by number in numpy
Assuming I have a numpy array like:
[1,2,3,4,5,6]
and another array:
[0,0,1,2,2,1]
I want to sum the items in the first array by group (the second array) and obtain n-groups results in group number order (in this case the result would be [3, 9, 9]). How do I do this in numpy?
Python: Start new command prompt on Windows and wait for it finish/exit
I don’t understand why it’s so hard to do this on Windows.