Brian
20 November 2008
15:13
as Python
Example of using dynamically created properties in class body.
| 1 | class Mp3File(object): |
|---|---|
| 2 | |
| 3 | # ... |
| 4 | |
| 5 | # Translate names to appropriate tag. |
| 6 | _tags = {'album' : 'TALB', |
| 7 | 'title' : 'TIT2', |
| 8 | 'artist': 'TPE1', |
| 9 | 'tracknumber' : 'TRCK', |
| 10 | 'genre' : 'TCON'} |
| 11 | |
| 12 | def make_prop(tag): |
| 13 | def getter(self): |
| 14 | val = self.tags.get(tag, None) |
| 15 | return val and val.text[0] or None |
| 16 | |
| 17 | def setter(self, value, tag=tag): |
| 18 | self.tags[tag] = getattr(id3, tag)(text=value, encoding=3) |
| 19 | self.tags.save() |
| 20 | return property(getter, setter) |
| 21 | |
| 22 | for name,tag in _tags.items(): |
| 23 | locals()[name] = make_prop(tag) |
| 24 | |
| 25 | del name,tag, make_prop |
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