* Introducing "Struct", the base class for all structured datatypes.

This is the original implementation as found in Ca+4H2_Hstorage_iter.py .
master
wirawan 14 years ago
parent dbd36e0f1f
commit d8984cf032
  1. 49
      params/params_struct.py

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# $Id: params_struct.py,v 1.1 2011-03-10 17:17:48 wirawan Exp $
#
# wpylib.params.params_struct module
# Created: 20110310
# Wirawan Purwanto
#
"""
params_struct.py
This module hosts `Struct', the simplest structured datatype,
which in python is basically the same as dict.
However this syntactic sugar will make your code very much like other
high-level language (less mess with a['member'] kind of thing).
Also this class will allow us to provide a base class to more specialized
classes of similar nature.
Other classes that are similar in purpose:
* wpylib.params.params_flat.Parameters
For assisting parameter lookup in functions.
* wpylib.db.result_base
For storing result from program output file.
CHARACTERISTICS/USAGE PATTERN
* Just like dict, it does not enforce a particular structure.
* Use words only as keys (i.e. keys are valid python identifiers).
* Do not prepend and append two underscores at the same time.
"""
class Struct(object):
"""A simplistic structured datatype.
No particular structure is assumed.
Results are fetchable by either X.member or X['member'] syntax.
Limited dict-like operations are supported."""
def __getitem__(self, item):
if hasattr(self, item):
return getattr(self, item)
else:
raise KeyError, "Invalid result name: %s" % (item)
def __contains__(self, item):
#return item in dir(self)
return hasattr(self, item)
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