| 1 | """Common utility functions |
| 2 | """ |
| 3 | |
| 4 | __copyright__ = """ |
| 5 | Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License version 2 as |
| 9 | published by the Free Software Foundation. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | """ |
| 20 | |
| 21 | def read_string(filename, multiline = False): |
| 22 | """Reads the first line from a file |
| 23 | """ |
| 24 | f = file(filename, 'r') |
| 25 | if multiline: |
| 26 | result = f.read() |
| 27 | else: |
| 28 | result = f.readline().strip() |
| 29 | f.close() |
| 30 | return result |
| 31 | |
| 32 | def write_string(filename, line, multiline = False): |
| 33 | """Writes 'line' to file and truncates it |
| 34 | """ |
| 35 | f = file(filename, 'w+') |
| 36 | if multiline: |
| 37 | f.write(line) |
| 38 | else: |
| 39 | print >> f, line |
| 40 | f.close() |
| 41 | |
| 42 | def append_strings(filename, lines): |
| 43 | """Appends 'lines' sequence to file |
| 44 | """ |
| 45 | f = file(filename, 'a+') |
| 46 | for line in lines: |
| 47 | print >> f, line |
| 48 | f.close() |
| 49 | |
| 50 | def append_string(filename, line): |
| 51 | """Appends 'line' to file |
| 52 | """ |
| 53 | f = file(filename, 'a+') |
| 54 | print >> f, line |
| 55 | f.close() |
| 56 | |
| 57 | def insert_string(filename, line): |
| 58 | """Inserts 'line' at the beginning of the file |
| 59 | """ |
| 60 | f = file(filename, 'r+') |
| 61 | lines = f.readlines() |
| 62 | f.seek(0); f.truncate() |
| 63 | print >> f, line |
| 64 | f.writelines(lines) |
| 65 | f.close() |
| 66 | |
| 67 | def create_empty_file(name): |
| 68 | """Creates an empty file |
| 69 | """ |
| 70 | file(name, 'w+').close() |