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On 11/10/2014 12:32 PM, Alexander Berntsen wrote: |
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> On 10/11/14 19:21, Zac Medico wrote: |
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>> Well, you'll have to clarify what's so "terrible" about it. Note that I didn't |
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>> use os.path.isdir or similar because those functions hide all kinds of relevant |
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>> exceptions, such as EACCES. |
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> I wish there were a more declarative way of expressing this in Python. |
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> It's extremely imperative. |
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We could certainly express it in a way that doesn't involve any mutating |
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loop control variables, but ultimately that's going to lead to more |
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lines of code, and it will leave imperative programmers wondering why we |
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didn't choose a simpler and more succinct approach. |
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For example, we could create an class for iterating over the paths from |
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a given path down to the root directory. Then we could create a function |
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which selects the first element from that iterator that exists. Once the |
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class and function are implemented, their usage would be very succinct: |
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first_parent = first_existing(iter_parents(path)) |
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-- |
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Thanks, |
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Zac |
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