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How can I save an image with PIL?
...for doing the conversion for proper visualization:
import sys
import numpy
from PIL import Image
img = Image.open(sys.argv[1]).convert('L')
im = numpy.array(img)
fft_mag = numpy.abs(numpy.fft.fftshift(numpy.fft.fft2(im)))
visual = numpy.log(fft_mag)
visual = (visual - visual.min()) / (visual.max(...
How do you do natural logs (e.g. “ln()”) with numpy in Python?
...
I usually do like this:
from numpy import log as ln
Perhaps this can make you more comfortable.
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Finding duplicates in O(n) time and O(1) space
Input: Given an array of n elements which contains elements from 0 to n-1, with any of these numbers appearing any number of times.
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Could not find default endpoint element
...u are calling the service in a class library and calling the class library from another project."
In this case you will need to include the WS configuration settings into the main projects app.config if its a winapp or web.config if its a web app. This is the way to go even with PRISM and WPF/Silve...
How to join absolute and relative urls?
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>>> from urlparse import urljoin
>>> url1 = "http://www.youtube.com/user/khanacademy"
>>> url2 = "/user/khanacademy"
>>> urljoin(url1, url2)
'http://www.youtube.com/user/khanacademy'
Simple.
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Why is git push gerrit HEAD:refs/for/master used instead of git push origin master
...for/'branch' ref using any Git client tool".
The following image is taken from the Intro to Gerrit. When you push to Gerrit, you do git push gerrit HEAD:refs/for/<BRANCH>. This pushes your changes to the staging area (in the diagram, "Pending Changes"). Gerrit doesn't actually have a branch c...
Line-breaking widget layout for Android
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Since May 2016 there is new layout called FlexboxLayout from Google, which is highly configurable for purpose you want.
FlexboxLayout is in Google GitHub repository at https://github.com/google/flexbox-layout at this moment.
You can use it in your project by adding dependency to...
Do AJAX requests retain PHP Session info?
...I had a user logged onto my site, having his id stored in $_SESSION , and from his browser he clicked a 'Save' button which would make an AJAX request to the server. Will his $_SESSION and cookies be retained in this request, and can I safely rely on the id being present in the $_SESSION ?
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How to check Django version
...der Linux and want to check the Python version you're using, run python -V from the command line.
If you want to check the Django version, open a Python console and type
>>> import django
>>> django.VERSION
(2, 0, 0, 'final', 0)
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Inserting image into IPython notebook markdown
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I am using ipython 2.0, so just two line.
from IPython.display import Image
Image(filename='output1.png')
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