I am still at the stone age, using scripts (e.g., to insert a string after a string) of the type
f = open("xxx.pdb", "r") for line in f: print line if "H16Z POPC" in line: print "TER" f.close() That is, I have to learn about modules. In your scripts I am lost about the filename for the pdb file to modify, francesco On Sat, Jul 26, 2008 at 11:35 AM, Lie <[EMAIL PROTECTED]> wrote: > On Jul 26, 2:41 pm, "Francesco Pietra" <[EMAIL PROTECTED]> wrote: >> How to insert letter "A" on each line (of a very long list of lines) >> at position 22, i.e., one space after "LEU", leaving all other >> characters at the same position as in the original example: >> >> ATOM 1 N LEU 1 146.615 40.494 103.776 1.00 73.04 1SG >> 2 >> >> In all lines"ATOM" is constant as to both position and string, while >> "LEU" is constant as to position only, i.e., "LEU" may be replaced by >> three different uppercase letters. Therefore, the most direct >> indication would be position 22. >> >> Should the script introduce blank lines, no problem. That I know how >> to correct with a subsequent script. >> >> Thanks >> chiendarret > > If you want to leave the rest of the strings as-is (i.e. the letter A > overwrites whatever on position 22), Peter's code need to be modified > a little: > line = line[:22] + " " + line[23:] > -- > http://mail.python.org/mailman/listinfo/python-list > -- Dr Francesco Pietra Professor of Chemistry Accademia Lucchese di Scienze, Lettere e Arti, founded in 1594 Palazzo Ducale 55100 Lucca (Italy) e-mail [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list