"Barak, Ron" <ron.ba...@lsi.com> wrote in message
news:7f0503cd69378f49be0dc30661c6ccf602494...@enbmail01.lsi.com...
Hi,
I am getting the error TypeError: seek() takes exactly 2 arguments (3
given), namely:
$ ./_LogStream.py
Traceback (most recent call last):
File "./_LogStream.py", line 47, in <module>
log_stream.last_line_loc_and_contents()
File "./_LogStream.py", line 20, in last_line_loc_and_contents
self.input_file.seek(-1, 2) # grab the last character
TypeError: seek() takes exactly 2 arguments (3 given)
When I run the below code.
I understand that the extra argument is the "self", but I don't know how
to change my class to make the seek(-1,2) work.
Could you help ?
Perhaps the extra agrument is 2. You don't mention your Python version, but
in Python 2.6.1 gzip files don't support seeking from the end. An older
(your?) version of Python may not be providing as helpful an error message.
f=gzip.GzipFile('blah.gz','r')
f.seek(-1,2)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\dev\python\lib\gzip.py", line 368, in seek
raise ValueError('Seek from end not supported')
ValueError: Seek from end not supported
-Mark
Thanks,
Ron.
$ cat _LogStream.py
#!/usr/bin/env python
import gzip
import sys
from Debug import _line as line
class LogStream():
def __init__(self, filename):
self.filename = filename
self.input_file = self.open_file(filename)
self.index_increment = 10
self.last_line_offset = -1
def last_line_loc_and_contents(self, estimated_line_size=1024):
assert estimated_line_size > 0
file_size = len(self.input_file.read())
self.input_file.seek(-1, 2) # grab the last character
if self.input_file.read(1) == '\n': # a "proper" text file
file_size -= 1
def open_file(self, in_file):
"""
The gzip module checks if the input file is a gzipped file, only
at the read stage.
This is why the f.readline() is needed.
"""
try:
f = gzip.GzipFile(in_file, "r")
f.readline()
except IOError:
f = open(in_file, "r")
f.readline()
f.seek(0)
return(f)
if __name__ == "__main__":
filename =
"../save_state/hp/save_state-ssp8400-0709R00004_081126-121659/var/log\\sac.log.4.gz"
log_stream = LogStream(filename)
log_stream.limit_ = 1000
log_stream.index_increment = 12
log_stream.last_line_loc_and_contents()
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