python Programming Glossary: file.seekhttp://stackoverflow.com/questions/11176724/python-file-operations or fseek operation if desired. So the solution is to add file.seek before the file.write call. For appending to the end of the.. file.write call. For appending to the end of the file use file.seek 0 2 . For your reference file.seek works as follows To change.. the end of the file use file.seek 0 2 . For your reference file.seek works as follows To change the file object 䏭 position use f.seek..
Python random N lines from large file (no duplicate lines) http://stackoverflow.com/questions/12279017/python-random-n-lines-from-large-file-no-duplicate-lines PATH var log cron def pick_next_random_line file offset file.seek offset chunk file.read CHUNK_SIZE lines chunk.split os.linesep..
http://stackoverflow.com/questions/2106820/re-open-files-in-python question You can reset the file pointer by calling seek file.seek 0 will do it. You need that line after your first readlines..
Read from a log file as it's being written using python http://stackoverflow.com/questions/3290292/read-from-a-log-file-as-its-being-written-using-python file.tell line file.readline if not line time.sleep 1 file.seek where else print line # already has newline Example was extracted..
Python: Undo a Python file readline() operation so file pointer is back in original state http://stackoverflow.com/questions/3505479/python-undo-a-python-file-readline-operation-so-file-pointer-is-back-in-origi by calling file.tell before the readline and then calling file.seek to rewind. Something like fp open 'myfile' last_pos fp.tell.. line fp.readline I can't recall if it is safe to call file.seek inside of a for line in file loop so I usually just write out..
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