May need on a small part of a file, and does not, therefore want to be forced into downloading the This is a critical feature in the big-data access model, where each sub-task of an operation Random access for the underlying file-like data (without downloading the whole thing). A subclass of AbstractBufferedFile provides Most implementations create file objects which derive from, and ) # of is just a place-holder with of as f : # f is now a real file-like object holding resources f. The initiation of the context which actually does the work of creating file-like instances. The way to work with OpenFile s is to isolate interaction with in a with context. These instances are also serialisable, because they do not contain any open Remote, in a compressed store, etc.) which is portable, and can also apply any compression and The () class provides a convenient way to prescribe the manner to (While making use of cached instances, where Thread-local material, and where possible, use local credentials (such as a token file)įor re-establishing sessions upon de-serialisation. Sensitive tokens in the pickled binary data.įsspec instances, generally speaking, abide by these rules, do not include locks, files and other So in many cases they would need to be able to re-establish credentials, ideally without passing These other processes may even be on other machines, Serialisability ¶Ĭoming out of the Dask stable, it was an important design decision that file-system instancesīe serialisable, so that they could be created in one process (e.g., the client) and used in It an interesting project beyond some other file-system abstractions. Here follows a brief description of some features of note of fsspec that provides to make
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