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POdbus Variant: How to preserve boolean datatype in Python?
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  1. POdbus Variant: How to preserve boolean datatype in Python?
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    copied!<p>I've been experimenting with dbus lately. But I can't seem to get my dbus Service to guess the correct datatypes for boolean values. Consider the following example:</p> <pre><code>import gtk import dbus import dbus.service from dbus.mainloop.glib import DBusGMainLoop class Service(dbus.service.Object): def __init__(self): bus_name = dbus.service.BusName("org.foo.bar", bus = dbus.SessionBus()) dbus.service.Object.__init__(self, bus_name, "/org/foo/bar") @dbus.service.method("org.foo.bar", in_signature = "a{sa{sv}}", out_signature = "a{sa{sv}}") def perform(self, data): return data if __name__ == "__main__": DBusGMainLoop(set_as_default = True) s = Service() gtk.main() </code></pre> <p>This piece of code creates a dbus service that provides the perform method which accepts one parameter that is a dictionary which maps from strings to other dictionaries, which in turn map strings to variants. I have chosen this format because of the format my dictionaries are in:</p> <pre><code>{ "key1": { "type": ("tuple", "value") }, "key2": { "name": "John Doe", "gender": "male", "age": 23 }, "test": { "true-property": True, "false-property": False } } </code></pre> <p>When I pass this dictionary through my service, the boolean values are converted to integers. In my eyes, the check should not be that difficult. Consider this (<code>value</code> is the variable to be converted to a dbus type):</p> <pre><code>if isinstance(value, bool): return dbus.Boolean(value) </code></pre> <p>If this check is done before checking for <code>isinstance(value, int)</code> then there would be no problem. Any ideas?</p>
 

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