Code:
import fileinput
for line in fileinput.FileInput("file", inplace=1):
line=line.replace("old","new")
print line
ghostdog74
Joined: Apr 14 '06
Location:
-
you can use fileinput for inplace editing
-
you can use re extension [:cntrl:]Leave a comment:
-
what command are you issuing? The fact is, most probably Perl can handle it on its own without resorting to system calls. (unless you are calling a proprietary application). show your code and example input files if any.Leave a comment:
-
get all your file contents to an array. if you want to skip line 1, print array starting from element 2. (or use array_pop). the manual documents array functions so check the manual.Leave a comment:
-
you can just assign array1 the values of array2
...Code:$array1=array(3,7,12,56,89); print_r($array1); $array2=array(12,89,3,7,56); print_r($array2); $array1=$array2; print_r($array1);
Leave a comment:
-
use the -v option of grepLeave a comment:
-
KISS
Code:>>> import string >>> x="abc123" >>> x.strip(string.letters) '123' >>> x="123abc" >>> x.strip(string.letters) '123' >>>
Leave a comment:
-
orCode:echo "/home1/pandadk/sandbox/odm/odm_daa/pub_odm_daa_test1/run" | tr "/" "\n"
Code:echo "/home1/pandadk/sandbox/odm/odm_daa/pub_odm_daa_test1/run" | awk '1' RS="/"
Leave a comment:
-
show a sample input file, describe how your output will be.Leave a comment:
-
Code:>>> a=1234 >>> list(str(a)) ['1', '2', '3', '4']
...Code:if not [i for i in a if not i.isdigit()]: print "True"
Leave a comment:
-
functions wise, there is no difference. They are just loops. Syntactically, they are different. PLease look through the bash reference manual for more information. I am just only advising on the caveats you will encounter when using a for cat loop to iterate a file. Special care need to be taken to ensure white spaces is escaped properly.Leave a comment:
-
don't use for loop with cat. Use while read loop instead to iterate a file
Code:while read line do # echo $line done < file
Leave a comment:
-
there's actually another less cumbersome way to do it.
Code:rm -rf /usr/[0-1][0-9][0-9] rm -rf /usr/200
Leave a comment:
-
try this
print item ,Leave a comment:
-
you can do ssh with python using paramiko or pyssh. search for them with google.Leave a comment:
-
you don't have to call bash commands for what you are doing, reading a file?
use Python's own methods. this will ensure portability with your code
if you want to use ls, use Python's os.listdir, glob.glob(), etcCode:myfile="/home/myfile" for lines in open(myfile): # equivalent of unix cat (or other tools for file reading) print lines
if you want to cd, use os.chdir() etc...Leave a comment:
-
...Code:# more file 123232 3232 2323 2323123123213 trterert # more file1 123232 3232 2323 2323123123213 XXXXXXXX 123232 3232 2323 2323123123213 trterert # ./test.sh 123232 or trterert not in line 1 123232 3232 2323 2323123123213 trterert # cat test.sh #!/bin/sh awk 'FNR==NR{ a[FNR]=$0;next } { for( i in a ){ if ( ( a[i] ~ $1) && ( a[iLeave a comment:
-
Code:>>> import textwrap >>> s="123456" >>> textwrap.wrap(s,3) ['123', '456']
Leave a comment:
No activity results to display
Leave a comment: