Python - How can I open a file and specify the offset in bytes?

Question

I\'m writing a program that will parse an Apache log file periodically to log it\'s visitors, bandwidth usage, etc..

The problem is, I don\'t want to open the log an

Answer 1

Here is code proving using the length sugestion of yours and the tell methond:

beginning="""line1
line2
line3"""

end="""- The log will open from this point
line4
line5"""

openfile= open('log.txt','w')
openfile.write(beginning)
endstarts=openfile.tell()
openfile.close()

open('log.txt','a').write(end)
print open('log.txt').read()

print("\nAgain:")
end2 = open('log.txt','r')
end2.seek(len(beginning))

print end2.read()  ## wrong by two too little because of magic newlines in Windows
end2.seek(endstarts)

print "\nOk in Windows also"
print end2.read()
end2.close()