How do I install the yaml package for Python?
I have a Python program that uses YAML. I attempted to install it on a new server using pip install yaml and it returns the following:
Python
Powersets in Python using itertools
I’m trying to create a powerset in Python 3. I found a reference to the itertools
module, and I’ve used the powerset code provided on that page. The problem: the code returns a reference to an itertools.chain object, whereas I want access to the elements in the powerset. My question: how to accomplish this?
numpy get index where value is true
>>> ex=np.arange(30) >>> e=np.reshape(ex,[3,10]) >>> e array([[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [10, 11, 12, 13, 14, 15, 16, 17, 18, 19], [20, 21, 22, 23, 24, 25, 26, 27, 28, 29]]) >>> e>15 array([[False, False, False, False, False, False, False, False, False, False], [False, False, False, False, False, False, … Read more
How to get precision, recall and f-measure from confusion matrix in Python
I’m using Python and have some confusion matrixes. I’d like to calculate precisions and recalls and f-measure by confusion matrixes in multiclass classification. My result logs don’t contain y_true and y_pred, just contain confusion matrix. Could you tell me how to get these scores from confusion matrix in multiclass classification? Answers: Thank you for visiting … Read more
How to implement common bash idioms in Python?
The Essential Linux/Unix commands. All of these are available through the subprocess library. This isn’t always the best first choice for doing all external commands. Look also at shutil for some commands that are separate Linux commands, but you could probably implement directly in your Python scripts. Another huge batch of Linux commands are in the os library; you can do these more simply in Python.
Python unpacking operator (*)
I was researching about python codegolf and saw someone use the unpacking operator in a strange way:
Can I use __init__.py to define global variables?
I want to define a constant that should be available in all of the submodules of a package. I’ve thought that the best place would be in in the __init__.py file of the root package. But I don’t know how to do this. Suppose I have a few subpackages and each with several modules. How can I access that variable from these modules?
Login to website using urllib2 – Python 2.7
Okay, so I am using this for a reddit bot, but I want to be able to figure out HOW to log in to any website.
If that makes sense….
String with ‘f’ prefix in python-3.6
I’m trying out Python 3.6. Going through new code, I stumbled upon this new syntax:
Execute multiple dependent commands individually with Paramiko and find out when each command finishes
I am writing a program in Python which must communicate through SSH with a physical target, and send to this targets some commands automatically (it is for testing).