referencing in cmd string
tjreedy at udel.edu
Sun Sep 14 17:26:11 CEST 2003
"Kali K E" <kalike2003 at netscape.net> wrote in message
news:ab5a234a.0309140638.e81fbab at posting.google.com...
> I wanted to grep a file for a pattern. The pattern is a dynamic one
> stored in the string "rec". I tried to do it as follows:
> cmd = "grep -c rec filelist2 > grepdata"
I believe you want the value of the string named 'rec', and not 'rec'
itself, inserted in your command string. If that value does not
itself need to be quoted within the command string, then this should
"grep -c %s filelist2 > grepdata" % rec
If your pattern has chars that make it necessary to be (double?)
quoted, then maybe
'grep -c "%s" filelist2 > grepdata' % rec
will work. (The command quoting rules depend on your OS and shell.)
Terry J. Reedy
is what you
More information about the Python-list