Programming :: Python: Storing A Matrix For Later Use?
Apr 30, 2010
I'm writing a command-line flash card program in Python. I've tried many existing applications, but none fit my specialized needs.
All of the words I'd like to study are manually added to a text file (study.txt). Each time the software is loaded, it checks for new words in that file and also compares them to a dictionary (a tab-separated file, dictionary.txt), and adds that to a matrix. The flash cards are thus automatically generated from study.txt and dictionary.txt.
Now, the software must manage lots of information about each word I'd like to study and add new information made while interacting with the program (such as when that word should be studied next).
That seems easy to put into a matrix. But what is the best way to put that information in a place where I can pull it back when I run the software tomorrow? Do I need to save the matrix to a CSV file, then convert the CSV file back to a matrix the next time the application is run?
This is one of the strangest problems I've run into while programming. Maybe there's just something wrong with my version of gcc or something.
The main problem comes at this point in the code:
Code: po = makePoFromScorbotXYZPR(X, Y, Z, P, R); h = makeHB2GFromPo(po); printf("%le", *h[1][0]); //##################################### Here it has the right value printf("%s", "
I have a program that sends QByteArray datagrams over a udp socket. I would like to have 4 bytes of the datagram that contain a 32 bit integer. When saving numbers to the QByteArray, I have tried the static function number(int) and member function setNum(int), but they convert the integer to its decimal string representation and save that in the byte array. So if the number were 10, it takes 2 bytes, if it were 10,000,000 it takes 8 bytes. This wastes space, and makes it more difficult to get the number when it is packed with a few other pieces of data in the same datagram. Is there a standard way of doing this in Qt?
I have a variable in which the data is stored as below:
variable_test=0m0.001s 0m0.001s 0m0.001s 0m0.001s 0m0.001s 0m0.001s .....an so on.
There are lots of values in format like "3m1.057s" are stored in variable_test separated with an space between two such values. For exapmple, value is "3m1.057s" I need to save different parts of a value in three separate array variables such as the
var_hour=3 var_min=1 var_sec= 057
tell if this can be done using "awk". A "WHILE" loop might be used to separate and store theses values I guess?
The first two rows of the second column are being replaced into the last two rows of the first column, now I even checked in visual studio and it works fine there. A friend tried my code and he gets it even worse: column 1:
0,0,0,0,1,1,1,1,1,1 column 2: 1,1,1,1,1,1,1,1,1,1
As far as I've seen it must be a problem with GCC, unfortunately I need to have this up and running in GCC no matter what.
my $file = 'test/mybigfile'; my $zip = Archive::Zip->new(); my $zipped = $zip->addFile($file);
[code]....
it simply takes a file (in this case, "mybigfile") and creates a ZIP file containing that file only. Now, my problem is that when I go to decompress the ZIP file, it creates the relative (or absolute, depending on case) path of the original file. To make an example:
Code:
$ pwd /tmp/perl $ ls -R
[code]....
What I need is *not* to store the path information inside of the ZIP file, so that once I decompress the ZIP file I only get the original one without having paths created.
I have a function definition in a Python 2.x script which take a tuple as one of its arguments, but 2to3 has no answers nor any of my searching on how to represent the same in Python 3.x
where variable would maybe be the output of grep from fileA. So can I store the output of grep in a variable to use it afterwards with awk ?
something like that:
Code: result=`grep prot. fileA` ; awk 'BEGIN { RS = "###" } /'$result'/' fileB > output but that doesn't work. I'm always getting the entire fileB.
The output of grep get stored in the variable, I verified that with echo. So there is something that I just don't get... It seems to me that the above line should work.
In the following code, I am trying to define a matrix in CCS (which is equivalent to CSR for a symmetric matrix, right ?) in ARPACK++. I have installed and patched ARPACK++. (The matrix is not sparse, but still it should not give an error)
[code]...
Why is this so ? I have checked the values of ia and ja by running intel MKl on the matrix to find the CSR (again, CSR=CCS for symmetric matrix, right ?--I am asking this because ARPACK++ uses CCS, not CSR), and the values are the same. Is this some problem of 0 and 1 indexing ? Does ARPACK++ use 1 indexing?
I want that I click with the mouse on the video, it paused.I notice that there is "BaconVideoWidget" which I guess is the video rendering widget but it don't have signal named "clicked":
In my script, I need to get execution time of a command (say 'ls') in mili seconds level. For this i tried using "time" command to retrieve the total execution time in milli seconds. But, the problem is that, how to save the output of time command in a variable. The format of the command is like "time ls -R /opt" Going further, the o/p of 'time' command is:
real 0m0.003s user 0m0.004s sys 0m0.000s
Here, in my script, I would like to use only middle line "user 0m0.004s" saved to the variable but unable to find out the way.
I have a python script I wrote a while ago and now I would like to call that script from inside C. I know how to do one command from C, but how would you execute an entire script from C, and passing arguments? Like:
I have decided to learn python as it seems to be powerful not just for web development (like php) but also a clean powerful language for other puposes.
Q: Can someone suggest a tutorial or book, on learning python (beginner to intermediate) which has as its focus for learning, web development?
In order of preference: 1. Comprehensive, 2. Online, 3. Free
I have a bash script that I want to import in to Python, mainly just to see if I can or not. However in the script I do use some piping of commands into sed to trim it down to what I need. When I tried doing it with the os.system() call, it didn't work. The exact error is
I am using Centos. I have written some scipts in python that access my routers and fetch the configuration, etc. Now i was thinking of creating a web interface which i can access from my windows XP. I want it to have good look n feel :-),
I've been loosely following this:http://norvig.com/lispy.htmlAnd I have a problem: the parsing function throws an array out of bounds exception. I thought that maybe I'm doing it wrong, so I copy and pasted the code from the page, and still the same error
