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Published on 2009-01-16T21:31:57Z
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2010/04/14
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Is there any benefit in using compile for regular expressions in Python?
h = re.compile('hello')
h.match('hello world')
vs
re.match('hello', 'hello world')
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I tried today to install a dvb-card on my Ubuntu 12.04 (Linux blauhai-linux 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
). The installation failed with an error. After that, i tried to install python (it was already installed but i got this error):
linux:~$…
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I installed sikuli-ide with
sudo apt-get install sikuli-ide
Everything was fine until I tried to start it from the terminal. I typed
sikuli-ide
But the only response I got was
[info] locale: en_US
The application was not started, furthermore there is no desktop file and sikuli-ide does not…
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I can't import some python libraries (PIL, psycopg2) that I just installed with MacPorts. I looked through these forums, and tried to adjust my PATH variable in $HOME/.bash_profile in order to fix this but it did not work.
I added the location of PIL and psycopg2 to PATH.
I know that Terminal is…
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I want to pass a chunk of Python code to Python in R with something like system('python ...'), and I'm wondering if there is an easy way to emulate the python console in this case. For example, suppose the code is "print 'hello world'", how can I get the output like this in R?
>>> print…
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Hi,
I am currently struggling to call a non python program from a python script.
I have a ~1000 files that when passed through this C++ program will generate ~1000 outputs. Each output file must have a distinct name.
The command I wish to run is of the form:
program_name -input -output -o1 -o2…
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I have a list of variables:
variables = ['VariableA', 'VariableB','VariableC']
which I'm going to search for, line by line
ifile = open("temp.txt",'r')
d = {}
match = zeros(len(variables))
for line in ifile:
emptyCells=0
for i in range(len(variables)):
regex = r'('+variables[i]+r')[:|=|\(](-…
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I was looking at the regular expression for validating various data types from the (OWASP Regex Repository).
One of the regular expressions in there is called safetext and looks like:
^[a-zA-Z0-9\s.\-]+$
My first question is:
Is this regular expression correct?
complementary question
If this…
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I am writing a tool to help students learn regular expressions. I will probably be writing it in Java.
The idea is this: the student types in a regular expression and the tool shows which parts of a text will get matched by the regex. Simple enough.
But I want to support several different regex…
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I'm writing a piece of client-side javascript code that takes a function and finds the derivative of it, however, the regex that's supposed to match with the power rule fails to work in the context of the javascript program, even though it sucessfully matches when it's used with an independent regex…
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I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test".
I'm no regex hero so I just tried a couple of things, like:
Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash
Regex Pattern…
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