Graham C10M talk at Shmoocon 2013
by This video was mentioned on highscalability.com, so I thought I’d have a look. Knowning this stuff is useful when you’re in the business of delivering …
Category: Programming
Using the Python debugger
A few days ago I found out that using the Python debugger is so easy, I can’t believe I haven’t used it before. Import the …
Sequential writes leveldb versus system_x
OK, calling it a benchmark is a bit of an overstatement. It’s taking two different database libraries for a quick spin, and seeing how fast …
Clustering in Python
In a project I’m going to use clustering algorithms implemented in Python, such as k-means. Clustering http://stackoverflow.com/questions/1545606/python-k-means-algorithm scipy.cluster has been reported to have some problems, …
Python: inverse of zip
So you have a list of tuples, created with the zip built-in function in Python. Like this: z = [(1, ‘a’), (2, ‘b’), (3, ‘c’)]z …
How to convert numpy matrix with different floats to matrix with zeros and ones
Given a numpy matrix (mixed_float_matrix) with a variety of float values, how do you convert it into a matrix, with zeros and ones (ones in …
Plotting data on maps with matplotlib
I’m learning about matplotlib, and actually just bought the book Matplotlib for Python Developers. Geographical plots Browsing stackoverflow, the matplotlib homepage, and other resources, I …
Making your Python code installable with PIP
I like to install 3rd party Python libraries using pip. Pip and easy_install can automatically download and install Python code from PyPi (also known as …
Trying SQLAlchemy for Python
Install SQLAlchemy This is easy (using pip): pip install sqlalchemypip install sqlalchemy Learn SQLAlchemy http://docs.sqlalchemy.org/en/latest/core/tutorial.html This tutorial uses an in memory SQLite database, which is …
How to install gfortran on Mac OS X
Why did I install gfortran? Well, not to write Fortran programs. I tried installing SciPy using pip install scipy, and I got a message that …