Hi everyone, I am writing some python script that should find a line which contains '1' in the data.txt file, then be able to move a certain number of lines down, before replacing a line. At the moment, I am able to find the line '1', but when I use f.seek to move, and then rewrite, what I write goes to the end of the .txt file, instead of being adjusted by my f.seek.
Do you know what way I should take? Data.txt is a file of 3 lines: line1 line2 line3 Code: with open('data.txt', 'r+') as f: firstread = f.readlines() # Take a snapshot of initial file f.seek(0,0) # Go back to beginning and search for line in f: print line if line.find('1'): print 'line matched' f.seek(1,1) # Move one space along f.write('house\n') # f.write overwrites the exact number of bytes. break # leave loop once '1' is found f.seek(0,0) # Go back to beginning, and read data.txt again lastread = f.readlines() print 'firstread is', firstread print 'lastread is', lastread This shouldn't be too difficult, but I don't know how. > < Help appreciated! -- http://mail.python.org/mailman/listinfo/python-list