On Fri, 27 Jul 2012 05:49:45 -0700, Mariano Di Felice wrote: > Hi, > I have a property file (.ini) that has multiple sections and relative > keys, as default structure.
Have you looked at Python's standard INI file library? http://docs.python.org/library/configparser.html > Now, I would like to export from my utility class methods getter and > setter. I have started as is: > > class Utility: > > keys = {"STANDUP": ["st_key1", "st_key2", "st_key3", "st_key4"], > "DEFAULT": ["def_key1", "def_key2", "def_key3", > "def_key4", "def_key5"]} This defines a *shared* class attribute. As it is attached to the class, not an instance, every instance will see the same shared dict. > def __init__(self): > for section, keyList in keys .items(): > for key in keyList: As given, this is a SyntaxError. Please do not retype your code from memory, always COPY AND PASTE your actual code. In this case, it is easy to fix the syntax error by fixing the indentation. But what other changes have you made by accident? Your code: def __init__(self): for section, keyList in keys .items(): looks for a *global variable* called keys, *not* the shared class attribute Utility.keys. By design, attributes are not in the function scope. If you want to access an attribute, whether class or instance, you must always refer to them as attributes. def __init__(self): for section, keyList in self.keys.items(): # this will work > setattr(self, "get_%s" % key, self.get_value(section, > key)) > setattr(self, "set_%s" % key, lambda > value:self.set_value(section, key, value) ) What a mess. What is the purpose of this jumble of code? My guess is that you are experienced with Java, and you are trying to adapt Java idioms and patterns to Python. Before you do this, you should read these two articles by a top Python developer who also knows Java backwards: http://dirtsimple.org/2004/12/python-is-not-java.html http://dirtsimple.org/2004/12/java-is-not-python-either.html > if __name__ == "__main__": > utility = Utility() > print "key2: %s" % utility.get_def_key2() ## -> value return 100 Again, another SyntaxError. This can be fixed. But the next part cannot. Except for two comments, 100 does not exist in your sample code. Python doesn't magically set values to 100. The code you give cannot possibly return 100 since nowhere in your code does it set anything to 100. If you actually run the code you provide (after fixing the SyntaxErrors), you get this error: py> utility = Utility() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 5, in __init__ NameError: global name 'keys' is not defined If you fix that and try again, you get this error: py> utility = Utility() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 7, in __init__ TypeError: get_value() takes exactly 2 arguments (3 given) The results you claim you get are not true. Please read this page and then try again: http://sscce.org/ -- Steven -- http://mail.python.org/mailman/listinfo/python-list
