I want to open a file and read each line using f.seek()
and f.tell()
:
test.txt:
abc
def
ghi
jkl
My code is:
f = open('test.txt', 'r')
last_pos = f.tell() # get to know the current position in the file
last_pos = last_pos + 1
f.seek(last_pos) # to change the current position in a file
text= f.readlines(last_pos)
print text
It reads the whole file.
ok, you may use this:
f = open( ... )
f.seek(last_pos)
line = f.readline() # no 's' at the end of `readline()`
last_pos = f.tell()
f.close()
just remember, last_pos
is not a line number in your file, it's a byte offset from the beginning of the file -- there's no point in incrementing/decrementing it.