Here is some additional information on the issue...
I see that if I type the following in ipython...
[1] import tables
I do get access to tables.LinkAtom and tables.LinkCol
If I type...
[2] from tables import *
Neither LinkAtom or LinkCol are available. Furthermore, if I use
tables.LinkCol in an IsDescription class and try to assign a string to
it I get a TypeError like the one below.
In [3]: class Test(IsDescription):
...: name = StringCol(100)
...: link_col = tables.LinkCol(100)
...:
...:
In [4]: h5file = openFile('mytables.h5','w')
In [5]: h5file.createTable('/', 'Test', Test, title='Test Table')
------------------------------------------------------------------------
---
TypeError Traceback (most recent call
last)
C:\tmp\<ipython console> in <module>()
C:\Python27\lib\site-packages\tables\file.pyc in createTable(self,
where, name,
description, title, filters, expectedrows, chunkshape, byteorder,
createparents)
772 description=description, title=title,
773 filters=filters, expectedrows=expectedrows,
--> 774 chunkshape=chunkshape, byteorder=byteorder)
775
776
C:\Python27\lib\site-packages\tables\table.pyc in __init__(self,
parentNode, name, description, title, filters, expectedrows, chunkshape,
byteorder, _log)
590
591 super(Table, self).__init__(parentNode, name, new,
filters,
--> 592 byteorder, _log)
593
594
C:\Python27\lib\site-packages\tables\leaf.pyc in __init__(self,
parentNode, name, new, filters, byteorder, _log)
289 # is a lazy property that automatically handles their
loading.
290
--> 291 super(Leaf, self).__init__(parentNode, name, _log)
292
293
C:\Python27\lib\site-packages\tables\node.pyc in __init__(self,
parentNode, name, _log)
294 # Create or open the node and get its object ID.
295 if new:
--> 296 self._v_objectID = self._g_create()
297 else:
298 self._v_objectID = self._g_open()
C:\Python27\lib\site-packages\tables\table.pyc in _g_create(self)
745 # set because it is needed for setting attributes
afterwards.
746 self._v_objectID = self._createTable(
--> 747 self._v_new_title, self.filters.complib or '',
obversion )
748 self._v_recarray = None # not useful anymore
749 self._rabyteorder = None # not useful anymore
C:\Python27\lib\site-packages\tables\tableExtension.pyd in
tables.tableExtension.Table._createTable
(tables\tableExtension.c:1822)()
C:\Python27\lib\site-packages\tables\utilsExtension.pyd in
tables.utilsExtension.createNestedType (tables\utilsExtension.c:7912)()
C:\Python27\lib\site-packages\tables\utilsExtension.pyd in
tables.utilsExtension.AtomToHDF5Type (tables\utilsExtension.c:5703)()
TypeError: Invalid type for atom LinkCol(itemsize=100, shape=(),
dflt='', pos=0)
Any thoughts or ideas?
-Mike
-----Original Message-----
I would like to create my own atom class but appear to be doing
something wrong. I basically just need a StringAtom but want to define a
new class with a new PyTables 'kind' of 'link' instead of 'string.'
I have added the following code to the atom.py file...
class LinkAtom(Atom):
"""
Defines an atom of type ``link``.
The item size is the *maximum* length in characters of strings.
"""
kind = 'link'
itemsize = property(
lambda self: self.dtype.base.itemsize,
None, None, "Size in bytes of a sigle item in the atom." )
type = 'string'
_defvalue = ''
def __init__(self, itemsize, shape=(), dflt=_defvalue):
if not hasattr(itemsize, '__int__') or int(itemsize) < 0:
raise ValueError( "invalid item size for kind ``%s``: %r; "
"it must be a positive integer"
% ('string', itemsize) )
Atom.__init__(self, 'S%d' % itemsize, shape, dflt)
However, when I run ipython and import tables a LinkAtom and by
extension a LinkCol is not created. Can someone tell me what I'm doing
wrong? This method of generating class in PyTables doesn't seen to be
very intuitive and/or pythonic.
-Mike
</pre>The contents of this electronic mail message and any attachments are
confidential, possibly privileged and intended for the addressee(s)
only.<br>Only the addressee(s) may read, disseminate, retain or otherwise use
this message. If received in error, please immediately inform the sender and
then delete this message without disclosing its contents to anyone.</pre>
------------------------------------------------------------------------------
Simplify data backup and recovery for your virtual environment with vRanger.
Installation's a snap, and flexible recovery options mean your data is safe,
secure and there when you need it. Data protection magic?
Nope - It's vRanger. Get your free trial download today.
http://p.sf.net/sfu/quest-sfdev2dev
_______________________________________________
Pytables-users mailing list
Pytables-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pytables-users
