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