readlines() loads the file into an array, instead of read() which it loads the file as a string. list is already used by Python as something else, I would avoid it. "\n" can cause problems since it represents the end of line, use r'' for raw. with open() takes care of the maintenance associated with opening a file.
Last edited by Aia; 10-31-2015 at 12:55 PM..
Reason: comment about readlines()
Hello all,
I have the below script and I'm a little stuck on the best way to continue.
Essentially I'm creating a text file (systems.txt) with a list of servers in it by hostname. Then I would like to echo a menu with each hostname and a number to use to pick it from the list. It's somehow... (7 Replies)
I have created a main menu in the following way:
while true; do
echo " "
echo "Main Menu: "
echo "Please Select An Option Using The Options Provided."
echo " "
echo "1 - Search All Files"
echo " "
echo "2 - Search Individual Files"
echo " "
... (1 Reply)
I am attempting to create a shell script with the following capaciblities:
1. Listed options to choice from
2. Use to perform awk statements
3. Print a report with the awk results
My questions are
1. How do I select more than one file for option #5 and #6
2. How to I create an... (11 Replies)
Is there a way i can take 'lets say the etc/group file' and arange the group names into a selectable numeric menu eg;
1) root:0
2) other:1
3) bin:2
4) sys:3
.....
.....
.....
and so on
then
GROUP="group name of users selection"
i have tried for over an hour searching on... (6 Replies)
How do I add the option to change the path in a menu? I have this script. The user chooses a number and had the option of doing something, looking for log files etc. There is a possibility they might want to look at a different path other than what I have given them such as... (2 Replies)
Hi all,
Can someone please advise how to get the full listing of a process using the ps command? Or is this not possible and I can only do this only by process ID?
Output am wanting to have is similar to when running /usr/ucb/ps -auxwww but preferably using "traditional" ps command that I... (1 Reply)
hey all,
I already installed nautilus-actions
now , I want to add "print path" script(option) to the right context menu!..
I did :
http://img853.imageshack.us/img853/6973/59818245.png
http://img847.imageshack.us/img847/8758/37217230.png
the script print located in... (2 Replies)
I have a script which uses READ to detect choice of menu option...now I want to change the script without doing whole rewrite such that when user runs ./script.sh 5 it would execute menu option 5 rather than user running ./script.sh waiting for it to load and then pressing "5 enter"
Is it... (1 Reply)
Hello,
I want to design a script that will call an existing menu script and select options one by one and redirict the out put to a file.
For example;-
In the script MENU.sh there are 10 options i want to design a script MENU2.sh that will select option 2 3 4 6 7 10 and redirict the output... (4 Replies)
Here is my script for the menu options.
# Bash Menu Script Example
PS3='Please enter your choice: '
options=("Option 1:" "Option 2:" "Other Reason:" "Quit")
select opt in "${options}"
do
case $opt in
"Option 1 :")
echo "you chose choice 1"
;;
... (3 Replies)
Discussion started by: mohtashims
3 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)