Python: is using “..%(var)s..” % locals() a good practice?
I discovered this pattern (or anti-pattern) and I am very happy with it.
Python
Reduce a key-value pair into a key-list pair with Apache Spark
I am writing a Spark application and want to combine a set of Key-Value pairs (K, V1), (K, V2), ..., (K, Vn) into one Key-Multivalue pair (K, [V1, V2, ..., Vn]). I feel like I should be able to do this using the reduceByKey function with something of the flavor:
Default arguments with *args and **kwargs
In Python 2.x (I use 2.7), which is the proper way to use default arguments with *args and **kwargs?
I’ve found a question on SO related to this topic, but that is for Python 3:
Calling a Python function with *args,**kwargs and optional / default arguments
How to determine file, function and line number?
In C++, I can print debug output like this:
Setting aspect ratio of 3D plot
I am trying to plot a 3D image of the seafloor from the data of a sonar run over a 500m by 40m portion of the seafloor. I am using matplotlib/mplot3d with Axes3D and I want to be able to change the aspect ratio of the axes so that the x & y axis are to scale. An example script with generated data rather than the real data is:
How would I build python myself from source code on Ubuntu?
Ubuntu comes with Python 2.7.2+ pre-installed. (I also downloaded the python dev packages.) Because of another issue I’m having (Explained in extreme depth in How do I replace/update the version of the expat library used by Apache? ), Graham Dumpleton told me my distro had explicitly built Python in a way to use an external pyexpat implementation, so causing my issue. He also said I could build Python myself from source code to resolve the issue. How would I do this on Ubuntu? (Keep in mind I’m new to Linux.)
Matplotlib issue on OS X (“ImportError: cannot import name _thread”)
At some point in the last few days, Matplotlib stopped working for me on OS X. Here’s the error I get when trying to import matplotlib:
Python simple socket client/server using asyncio
I would like to re-implement my code using asyncio coroutines instead of multi-threading.
Pandas pd.Series.isin performance with set versus array
In Python generally, membership of a hashable collection is best tested via set. We know this because the use of hashing gives us O(1) lookup complexity versus O(n) for list or np.ndarray.
Access IP Camera in Python OpenCV
How do I access my IP Camera stream?