Numpy extract submatrix
Give np.ix_ a try: This returns your desired result:
Python
TypeError: ‘_io.TextIOWrapper’ object is not subscriptable
You can’t index (__getitem__) a _io.TextIOWrapper object. What you can do is work with a list of lines. Try this in your code: Also, you aren’t closing the file object, this would be better: with ensures that file get closed, see docs
Multiple try codes in one block
You’ll have to make this separate try blocks: This assumes you want to run code c only if code b failed. If you need to run code c regardless, you need to put the try blocks one after the other: I’m using except ExplicitException here because it is never a good practice to blindly ignore … Read more
ImportError: No module named ‘yaml’
I have one script in which I am trying to execute But, I am getting the following error: PyYAML is already installed in the machine: How can I get this script to import PyYAML?
How can I check if two segments intersect?
The equation of a line is: For a segment, it is exactly the same, except that x is included on an interval I. If you have two segments, defined as follow: The abcisse Xa of the potential point of intersection (Xa,Ya) must be contained in both interval I1 and I2, defined as follow : And … Read more
Does Numpy automatically detect and use GPU?
Does Numpy/Python automatically detect the presence of GPU and utilize it to speed up matrix computation (e.g. numpy.multiply, numpy.linalg.inv, … etc)? No. Or do I have code in a specific way to exploit the GPU for fast computation? Yes. Search for Numba, CuPy, Theano, PyTorch or PyCUDA for different paradigms for accelerating Python with GPUs.
Can’t find module cPickle using Python 3.5 and Anaconda
There is no cPickle in Python 3. Just import pickle. pickle will automatically use the C accelerator.
How to get the unit vector from a numpy array
This question already has answers here: How to normalize a NumPy array to a unit vector? (13 answers) Closed 3 years ago. Lets say I have a vector v, and I want the unit vector, i.e. v has length 1.0 Is there a direct way to get that from numpy? I want something like: Rather … Read more
How to convert ‘binary string’ to normal string in Python3?
Decode it. To get bytes from string, encode it.
How to save a Seaborn plot into a file
I tried the following code (test_seaborn.py): But I get this error: I expect the final output.png will exist and look like this: How can I resolve the problem?