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60 lines
1.8 KiB
60 lines
1.8 KiB
# $Id: params_struct.py,v 1.2 2011-03-10 19:21:33 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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* User fields should not use keywords prepended and appended by two underscores
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(those names are reserved by python).
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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 __init__(self, __src__=None, **p):
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"""Initializes the structure.
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The arguments will be copied into the structure as the initial values
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of the structure.
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They can be a dict-like object (first argument), or "key=value"-type
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argument passing.
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"""
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if __src__: self.__dict__.update(__src__)
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self.__dict__.update(p)
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def __getitem__(self, item):
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return self.__dict__[item]
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def __setitem__(self, item, val):
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self.__dict__[item] = val
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def __contains__(self, item):
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return item in self.__dict__
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def __iter__(self):
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return self.__dict__.__iter__()
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