substitution

Sometimes in Python scripts I see lines like: cmd = "%s/%s_tb -cm cond+line+fsm -ucli -do \"%s\"" Where is the %s in the above line substituted? Does Python have some stack of strings and it pops them and replaces %s ? That would be later used in something like: print cmd % ('foo','boo','bar') What you're seeing is just a string assignment with fields in it which will later be filled in. Basics of python string formatting Not a specific answer to your line of code, but since you said you're new to python I thought I'd use this as an example to share some joy ;) Simple Example Inline With a

I would like use a function that uses the standard deparse(substitute(x)) trick within lapply . Unfortunately I just get the argument of the loop back. Here's my completely useless reproducible example: # some test data a <- 5 b <- 6 li <- list(a1=a,b2=b) # my test function tf <- function(obj){ nm <- deparse(substitute(obj)) res <- list(myName=nm) res } tf(a) #returns $myName [1] "a" which is fine. If I use lapply I either get [[1L]] or the x argument of an anonymous function. lapply(li,function(x) tf(x)) # returns $a1 $a1$myName [1] "x" $b2 $b2$myName [1] "x" Is there any way to obtain the

I saw other questions dealing with the finding the n-th occurrence of a word/pattern, but I couldn't find how you would actually substitute the n-th occurrence of a pattern in vim. There's the obvious way of hard coding all the occurrences like :s/.*\(word\).*\(word\).*\(word\).*/.*\1.*\2.*newWord.*/g Is there a better way of doing this? John Kugelman You can do this a little more simply by using multiple searches. The empty pattern in the :s/pattern/repl/ command means replace the most recent search result. :/word//word//word/ s//newWord/ or :/word//word/ s/word/newWord/ You could then repeat

I'm having little problem with bash/sed. I need to be able to use command substitution within sed expression. I have two big text files: first is logfile.txt which sometimes* shows error messages by ID (0xdeadbeef is common example) in format ERRORID:0xdeadbeef second errors.txt has error messages stored in pairs LONG_ERROR_DESCRIPTION, 0xdeadbeef I was trying to use sed with bash command substitution to do the task: cat logfile.txt | sed "s/ERRORID:\(0x[0-9a-f]*\)/ERROR:$(cat errors.txt | grep \1 | grep -o '^[A-Z_]*' )/g" (^^^ this should be in one line of course) If it would work then I

Have a file eg. Inventory.conf with lines like: Int/domain—home.dir=/etc/int I need to replace / and — before the = but not after. Result should be: Int_domain_home_dir=/etc/int I have tried several sed commands but none seem to fit my need. SLePort Sed with a t loop (BRE): $ sed ':a;s/[-/—.]\(.*=\)/_\1/;ta;' <<< "Int/domain—home.dir=/etc/int" Int_domain_home_dir=/etc/int When one of the -/—. character is found, it's replaced with a _ . Following text up to = is captured and output using backreference. If the previous substitution succeeds, the t command loops to label :a to check for further