1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
Multi Filesystem
================
A MultiFS is a filesystem composed of a sequence of other filesystems,
where the directory structure of each overlays the previous filesystem
in the sequence.
One use for such a filesystem would be to selectively override a set of
files, to customize behavior. For example, to create a filesystem that
could be used to *theme* a web application. We start with the following
directories::
`-- templates
|-- snippets
| `-- panel.html
|-- index.html
|-- profile.html
`-- base.html
`-- theme
|-- snippets
| |-- widget.html
| `-- extra.html
|-- index.html
`-- theme.html
And we want to create a single filesystem that will load a file from
``templates/`` only if it isn't found in ``theme/``. Here's how we could
do that::
from fs.osfs import OSFS
from fs.multifs import MultiFS
theme_fs = MultiFS()
theme_fs.add_fs('templates', OSFS('templates'))
theme_fs.add_fs('theme', OSFS('theme'))
Now we have a ``theme_fs`` filesystem that presents a single view of both
directories::
|-- snippets
| |-- panel.html
| |-- widget.html
| `-- extra.html
|-- index.html
|-- profile.html
|-- base.html
`-- theme.html
.. autoclass:: fs.multifs.MultiFS
:members:
|
