Fix seek throwing UnsupportedOperationException #80
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Sorry, there seem to be more issues with files not supporting seek than just opening them at the moment. This doesn't seem to be covered by the unit tests. I'll have to do some more investigation before I can submit a pull request. |
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There are some file-like object implementation, most notably in the Python standard library (
zipfile.ZipExtFile), wherehasattr(filelike, "seek")returnsTruebut callingseek()raisesUnsupportedOperationException.This PR fixes this by catching
UnsupportedOperationException, in effect handling it as ifhasattr(filelike, "seek")returnsFalse.If required, I can provide a full example showing the issue (i.e. reading directly from a ZIP without unzipping, which I'm currently writing a blogpost about).