Programming :: Run Shell Scripts Wrapped In Python?
Jul 11, 2010
I'm a new programmer (a life-long desire, but at 40 just getting to it) and cutting my teeth with Python. I just found the popen2 module today. I was so excited because I could do this:
Code:
>>> from popen2 import popen3
>>> cmd ="""TEXT="Hello, World!"
... echo $TEXT"""
>>> std_out, std_in, std_err = popen3(cmd)
[code].....
If you want to use another shell, substitute that shell for /bin/bash (e.g., /bin/sh for the shell portability purists out there). It is easy to modify what is returned as well. Don't like the tuple? Then just change it to return or even print stdout if you like.
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Jun 25, 2010
Is there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?
Example:
Code:
>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...
I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.
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Aug 28, 2010
I have a python script that i want to convert to shell for a specific reason. The converted script should also be able to accept a command line arg such as hostname, which the current python script doesn't.
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Mar 22, 2009
I want to be able to do
sudo ./program.py
instead of always having to do
sudo python program.py
What do I need to change?
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Nov 30, 2009
I've already used line split stuff to transform my data into something like this in a text file:
Code:
['1', '1', '3', '20.7505207']
['2', '1', '3', '23.0488319']
['3', '1', '3', '-1.5768747']
['4', '1', '3', '-26.4772491']
[code]....
How can I get this on a python program so I can manipulate it as an array?
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Mar 4, 2010
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
Code:
def blah(self, (string1, string2))
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Dec 23, 2010
how do i get a python shell and idle on Ubuntu? so i can start learning how to write codes.
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Oct 22, 2010
I want to write a shell script contains python one. So,the result of python one is flv file. I want the path of this is copied into a enviroment variable that i have to pass as a flag argument of another program (to convert into mp3). To individuate the result of python script I thought to use (in PWD)
Code:
ls | grep -E '^.*mp3$'
But my question is: How can I copy this result into enviroment variable?
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Jun 4, 2010
I do not know how to write either PYTHON or Bash Shell Scripting. I am to learn one for Linux Administration purpose. Which one will you recommend for a Linux Admin/Eng environment?
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Feb 9, 2011
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":
Code:
vd = totem_object.get_video_widget()
vd.connect("clicked", vd.hide)
[code]....
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Jun 5, 2011
I am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax.
Code:
if [ $# -eq 0 ] ; then
d=`pwd`
for i in * ; do
if test -d $d/$i ; then
echo "$i:"
code....
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Jan 18, 2011
When I was changing my password with the "passwd" command in Debian Lenny, after the confirmation, I received the following message: Bad: new password is just a wrapped version of the old one
I know the passwords are not saved in clear text, but hashes. Even further, when a single char changes in the string (the password in this case) the hash is completely different. So, how does linux detect a wrapped version of an old password?
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Oct 8, 2010
I'm having a problem with sed syntax. So far I can sed the HiResBoundingBox to capture the images I want and output to pdf. But now ever so often I get an illustrator file that has hexadecimal values at the start and end of the file. Imagemagick powers through this and still creates the rastorized previews I want but the gs dies using the epstopdf script to output the vector files. If I hand remove the hex on both ends of the file, both functions work fine and the file can still be managed in illustrator but if I resave it the hex comes back. It only happens on a few files plus it seems to serve no purpose as the files work perfectly without it. I cannot get the sed statement to work. I've tried a blue million variations with no luck. Copied some that I found, same result.
Start of bad eps file:
ADOÆ ^@^@^@5O
^@^@^@^@^@^@^@^@^@UO
^@im^K^@yy^@^@%!PS-Adobe-3.1 EPSF-3.0^M
The way I need it to look:
%!PS-Adobe-3.1 EPSF-3.0^M
End of file the same:
%AI9_PrivateDataEnd^M
@ @
just needs to be:
%AI9_PrivateDataEnd^M
Tried
sed -n '/%/,$p' < = blank file
sed -i 's/%/,$!d/g' = same
sed 's/%/,$!d/g' = same
sed 's/%/,$!d' = same
I can't seem to find any proper reference to this.
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Feb 8, 2011
I considered making my system run the following if an incorrect password is entered 10 times in a row or a specific dead-password is entered.Code:shred /home/.ecryptfs/$USER/.ecryptfs/wrapped-passphrase.Because ext4 doesn't journal the contents of the file, only the metadata, the file would be shredded and it would be impossible to recover the encrypted home folder even with the password.Is there a simple way I could make GDM check this or would I have to patch and recompile GDM for something like this to work?
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Feb 14, 2011
I just added a nice little HDTV as a second display on my laptop, it worked fine but I found that the text was a bit hard to read so I decided to change it, got another one yesterday, just plugged it in and everything was perfect. Today I came back from work, plugged the laptop in the monitor, booted the machine, and got a wrapped display, the bottom part (about 1/4 of teh display) seem to be stuck with the content that was visible when I opened my session, and the top part is shifted up, making it totally useless.I took a picture of the display, you can see it here [URL]... I will try to see what happen if I put back the other display, but I really want to get working with the new one.
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Apr 21, 2010
I'm starting to learn python and I am wondering whether I should start with python 2.x or should I just start learning python 3.x?
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Dec 15, 2009
I've created a simple script based menu. This menu will be accessed by only a certain users via ssh.When user logs in, the menu will automatically run. (configured at user's .bash_profile).How do I force the session to close when user hits Ctrl-C or Ctrl-Break ?In a nutshell, I don't want user to have access to shell.
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Nov 12, 2009
I've only seen this occur in cases where I'm viewing a GPG-signed message and a line wraps. A plus sign appears at the beginning of the next line. Is this something I can get rid of?
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Apr 6, 2010
I have an existing line of code from a P2 script that I cannot find a solution to converting to P3:
Code:
for i, x in map(None, list1, list2):
I have found the information about converting the simple case:
map(None,x) becomes list(x)
But my googling was unable to find a solution when more than one iterable exists.
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Jan 31, 2010
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:
Code:
int main(void)
{
python( myprogram(1 2 3) );
}
So I can pass arguments to my script.
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Jan 19, 2010
what the equivalent function in Python 3.1.1 is for Python 2.6.4s:
Py_FindMethod
Be buggered if I can find anything in the doco to say what replaced it or what alternative code may need to be entered to replace it
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Dec 17, 2010
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
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May 24, 2010
I have an HP Compaq nx6235 Notebook, which was happily running Windows Vista Home Premium, until I finally got around to loading Linux openSUSE 11.1 from a DVD issued with a magazine last year. I now have a problem, because my Windows Vista has been wrapped up in the Linux partitioning system. I know it is located at dev/sda1 and that it is an HPFS/NTFS filetype, create a dual boot drive on my notebook, so that I can happily play with both systems. I am newbie, so the instructions should be as clear and simple as possible.
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Dec 16, 2010
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
sed: -e expression #1, char 16: unterminated `s' command
However the command that was run can be run in bash without an error. Is there a better/another way to do this? For reference the command is:
Code:
locate -n 1 wp-config.php | sed 's/wp-config.php/
/g' | sed '/wp-config.php/ d' | sed '/^$/ d'
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Mar 17, 2011
I am using Centos. I have written some scipts in python that access my routers and fetch the configuration, etc. Now i was thinking of creating a web interface which i can access from my windows XP. I want it to have good look n feel :-),
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Jan 25, 2009
I want to create 3D animation and also make some big programs. Is python capable of that? or should I stick to C++?
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Dec 11, 2010
I am trying to build an application that must link with python so as to load a python module during runtime.I have this makefile :
Code:
[alex@iskandhar src]$ cat Makefile
CFLAGS = -Wall -O3 -I ../../../SPOOLES.2.2 -DARCH="Linux" -DSPOOLES -DARPACK
[code]....
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May 10, 2011
I have a list of list and I'd like to sort the list according to the last value of each row.
Let's say we have the list
L1 = [ [1,2] , [4,6] , [78,-3] ]
I wish to get
L2 = [ [78,-3] , [1,2] , [4,6] ]
Is there a simple way to do that in python?
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Feb 1, 2011
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
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Oct 12, 2010
I am having a problem initializing the Pmw megawidgets for Python 2.6.I have Pmw_1_3 loaded in the site-packages directory.
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