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copied!<p><em>This first part was an answer to the original question if choosing the first non-None element to append. See updates below that address the revised question</em></p> <p>Without trying to do a crazy one-line or something too fancy, I think this is a pretty easy solution. Just loop over them and append the first one that is not None, then break.</p> <pre><code>for loc in (self.room, self.floor, self.building): if loc is not None: location.append(loc) break </code></pre> <p>If you want a one-liner, here is a list comprehension:</p> <pre><code>location = [l for l in (self.room, self.floor, self.building) if l is not None][:1] </code></pre> <p>A more readable compromise to that last one could be:</p> <pre><code>options = (self.room, self.floor, self.building) location = [l for l in options if l is not None][:1] </code></pre> <p>@tzaman was right in suggesting not to use <code>property</code> for your variable names. It is a built in type:</p> <pre><code>>>> property <type 'property'> class property(object) | property(fget=None, fset=None, fdel=None, doc=None) -> property attribute | | fget is a function to be used for getting an attribute value, and likewise | fset is a function for setting, and fdel a function for del'ing, an | attribute. Typical use is to define a managed attribute x: </code></pre> <p><strong>Update</strong></p> <p>Because in your comments you mentioned what you actually wanted was any of those properties that are not None, its a super simple list comp:</p> <pre><code>locations = [l for l in (self.room, self.floor, self.building) if l is not None] </code></pre> <p><strong>Update 2:</strong> <em>A great suggestion in the comments by @Vaughn Cato</em></p> <pre><code>locations = filter(None, [self.room, self.floor, self.building]) </code></pre>

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