MNT: Raise FileNotFoundError on non-existent path #137
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Update the
IndexedGzipFile
class to raise aFileNotFoundError
rather than aValueError
, when passed a path to a non-existent file. This change is made to improve consistency with thegzip.GzipFile
class.To preserve compatibility, a custom error type is raised - this type sub-classes both
FileNotFoundError
andValueError
.