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rreplace - How to replace the last occurrence of an expression in a string?
Is there a quick way in Python to replace strings but, instead of starting from the beginning as replace does, starting from the end? For example:
...
What is the definition of “interface” in object oriented programming
...y typed nature of some OO languages, as it is the case with Java or C#. In Python on the other hand, another mechanism is used:
import random
# Dependencies
class KnownNumber(object):
def generate(self):
return 5
class SecretNumber(object):
def generate(self):
return rand...
How to set the matplotlib figure default size in ipython notebook?
I use "$ipython notebook --pylab inline" to start the ipython notebook. The display matplotlib figure size is too big for me, and I have to adjust it manually. How to set the default size for the figure displayed in cell?
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What is tail recursion?
...he running_total is updated.
Note: The original answer used examples from Python. These have been changed to JavaScript, since Python interpreters don't support tail call optimization. However, while tail call optimization is part of the ECMAScript 2015 spec, most JavaScript interpreters don't supp...
Differences between Emacs and Vim
...Vim has a lot of weird levels to its programmability, with the addition of Python and Ruby bindings (and more, I forget), Vim is also programmable in most ways you'd care for.
I use Vim, and I'm fairly happy with it.
share
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Extracting specific columns in numpy array
...
I think the solution here is not working with an update of the python version anymore, one way to do it with a new python function for it is:
extracted_data = data[['Column Name1','Column Name2']].to_numpy()
which gives you the desired outcome.
The documentation you can find here: ht...
How do I get logs/details of ansible-playbook module executions?
....167] => (item=htop,vim-tiny,curl,git,unzip,update-motd,ssh-askpass,gcc,python-dev,libxml2,libxml2-dev,libxslt-dev,python-lxml,python-pip)
stdout:
Reading package lists...
Building dependency tree...
Reading state information...
libxslt1-dev is already the newest version.
0 upgraded, 0 newly ins...
Convert a timedelta to days, hours and minutes
...s) dates in a log file are monotonous. See How can I subtract a day from a python date? that may have to deal with similar issues.
– jfs
May 9 '15 at 10:34
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How To Check If A Key in **kwargs Exists?
Python 3.2.3. There were some ideas listed here , which work on regular var's, but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists?
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how does multiplication differ for NumPy Matrix vs Array classes?
...ally I find it more trouble than it's worth, though.
For arrays (prior to Python 3.5), use dot instead of matrixmultiply.
E.g.
import numpy as np
x = np.arange(9).reshape((3,3))
y = np.arange(3)
print np.dot(x,y)
Or in newer versions of numpy, simply use x.dot(y)
Personally, I find it much mo...