A python implementation of GNU tail and head - forked from google code rev#3
the original introduction
Python tail is a simple implementation of GNU tail and head.
It provides 3 main functions that can be performed on any file-like object that supports seek() and tell().
- tail - read lines from the end of a file
- head - read lines from the top of a file
- follow - read lines as a file grows
It also comes with pytail, a command line version offering the same functionality as GNU tail. This can be particularly useful on Windows systems that have no tail equivalent.
note that the file argument does not require 'file handler' now.
f = open('test.txt', 'w') for i in range(11): f.write('Line %d\n' % (i + 1)) f.close() import tailer # Get the last 3 lines of the file tailer.tail('test.txt', 3) # ['Line 9', 'Line 10', 'Line 11'] # Get the first 3 lines of the file tailer.head('test.txt', 3) # ['Line 1', 'Line 2', 'Line 3'] # Follow the file as it grows for line in tailer.follow('test.txt'): print line