80 lines
1.4 KiB
Plaintext
80 lines
1.4 KiB
Plaintext
|
|
Let's do a walk through a memory filesystem.
|
|
|
|
.. >>> import py
|
|
|
|
|
|
working with directories
|
|
---------------------------------
|
|
|
|
Let's create some directories and list them from memory::
|
|
|
|
>>> fs = py.fs.MemoryFS()
|
|
>>> fs.mkdir("x")
|
|
>>> fs.mkdir("y")
|
|
>>> fs.listdir()
|
|
['x', 'y']
|
|
|
|
|
|
Creating, removing and reading files
|
|
---------------------------------------------
|
|
|
|
>>> f = fs.open('x/file', 'w')
|
|
>>> f.write("hello world")
|
|
>>> f.close()
|
|
>>> fs.listdir("x")
|
|
['file']
|
|
>>> f = fs.open("x/file", 'r')
|
|
>>> f.readlines()
|
|
['hello world']
|
|
>>> f.seek(6)
|
|
>>> f.read(3)
|
|
"wor"
|
|
>>> f.read()
|
|
"ld"
|
|
>>> f.close()
|
|
>>> fs.remove("y")
|
|
>>> fs.listdir()
|
|
['x']
|
|
>>> fs.remove("non-existent")
|
|
py.error.ENOENT
|
|
|
|
stat / checking for meta information
|
|
---------------------------------------
|
|
|
|
>>> stat = memory.stat("x")
|
|
>>> stat.isdir()
|
|
True
|
|
>>> stat.isfile()
|
|
False
|
|
>>> stat.exists()
|
|
True
|
|
>>> stat.islink()
|
|
False
|
|
|
|
Linking to other objects
|
|
--------------------------------------------------------
|
|
|
|
First an example how to link internally, i.e. within the
|
|
filesystem.
|
|
|
|
>>> fs.link("newitem", "x")
|
|
>>> fs.stat("newitem").islink()
|
|
True
|
|
>>> fs.stat("newitem").isfile()
|
|
True
|
|
>>> fs.remove("newitem") # only deletes the link itself
|
|
>>> fs.stat("x").exists()
|
|
|
|
cross-filesystem references
|
|
---------------------------------
|
|
|
|
>>> otherfs = py.fs.MemoryFS()
|
|
|
|
XXX
|
|
|
|
>>> fs.setproxy("newitem", otherfs, "otheritem")
|
|
>>> fs.stat("newitem").exists()
|
|
False
|
|
>>> otherfs.mkdir("otheritem")
|