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Escaping regex string
...ort re
>>> re.escape('^a.*$')
'\\^a\\.\\*\\$'
If you are using a Python version < 3.7, this will escape non-alphanumerics that are not part of regular expression syntax as well.
If you are using a Python version < 3.7 but >= 3.3, this will escape non-alphanumerics that are not par...
Is there a difference between “raise exception()” and “raise exception” without parenthesis?
...can pass it arguments if needed).
The usual style that most people use in Python (i.e. in the standard library, in popular applications, and in many books) is to use raise MyException when there are no arguments. People only instantiate the exception directly when there some arguments need to be p...
Can Selenium interact with an existing browser session?
...
This is a duplicate answer
**Reconnect to a driver in python selenium ** This is applicable on all drivers and for java api.
open a driver
driver = webdriver.Firefox() #python
extract to session_id and _url from driver object.
url = driver.command_executor._url #...
RuntimeWarning: invalid value encountered in divide
...
Python indexing starts at 0 (rather than 1), so your assignment "r[1,:] = r0" defines the second (i.e. index 1) element of r and leaves the first (index 0) element as a pair of zeros. The first value of i in your for loop is ...
C++ Build Systems - What to use? [closed]
...ystem will be as bullet-proof as Scons. But, it's slow. It is written in Python and we've extended the interface for our "workspace-organization" (where we merely specify module dependencies), and that is part of the Scons design intent (this type of extension through Python). Convenient, but bui...
How to plot multiple functions on the same figure, in Matplotlib?
...
Perhaps a more pythonic way of doing so.
from numpy import *
import math
import matplotlib.pyplot as plt
t = linspace(0,2*math.pi,400)
a = sin(t)
b = cos(t)
c = a + b
plt.plot(t, a, t, b, t, c)
plt.show()
...
REST response code for invalid data
...contained instructions. For example, this error condition may occur if an XML request body contains well-formed (i.e., syntactically correct), but semantically erroneous, XML instructions.
share
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How to convert a string to lower case in Bash?
...for another site so I thought I'd post it up here:
UPPER -> lower:
use python:
b=`echo "print '$a'.lower()" | python`
Or Ruby:
b=`echo "print '$a'.downcase" | ruby`
Or Perl (probably my favorite):
b=`perl -e "print lc('$a');"`
Or PHP:
b=`php -r "print strtolower('$a');"`
Or Awk:
b=`...
Integrate ZXing in Android Studio
...nding CaptureActivity, and specify the orientation in your AndroidManifest.xml.
– ChaturaM
Aug 20 '15 at 5:57
When try...
how to convert an RGB image to numpy array?
...
You can use newer OpenCV python interface (if I'm not mistaken it is available since OpenCV 2.2). It natively uses numpy arrays:
import cv2
im = cv2.imread("abc.tiff",mode='RGB')
print type(im)
result:
<type 'numpy.ndarray'>
...