ndarray-npy

Breaking Changes

• Updated to ndarray 0.16.
• Updated to zip 2.
• Updated minimum Rust version to 1.64.
• Removed unsafe from WritableElement trait declaration.
• Altered the behavior regarding .npy extensions of the file names within .npz archives to match NumPy's behavior, by @jturner314. See #76. Specifically,
  • NpzWriter::add_array() now appends .npy to the name.
  • NpzReader::names() now strips a single .npy (if present) from the end of each name.
  • NpzReader::by_name() now tries {name}.npy if {name} is not present in the archive.

New Features

• Added NpzWriter::new_with_options(), which allows for different compression options, etc., when writing .npz files. By @DCNick3. See #66 for the motivation.

• Added support for complex floating point element types with the new num-complex-0_4 feature.

• Updated to ndarray 0.15.
• Updated to py_literal 0.4.
• Updated to Rust 1.49.

• Added a .finish() method to NpzWriter. All users of NpzWriter should call this method, after the write of the last array, in order to properly handle errors. (Without calling .finish(), dropping will automatically attempt to finish the file, but errors will be silently ignored.)
• Changed the write_npy convenience function and the NpzWriter::add_array method to buffer writes using BufWriter. This significantly improves write performance for arrays which are not in standard or Fortran layout. The docs of WriteNpyExt::write_npy have also been updated to recommend that users wrap the writer in a BufWriter. Thanks to [@bluss] for reporting the unbuffered writes issue and reviewing the PR.
• Changed WriteNpyExt::write_npy to always call .flush() before returning. This is convenient when the writer passed to WriteNpyExt::write_npy is wrapped in a BufWriter.

• Added support for viewing byte slices as .npy files, primarily for use with memory-mapped files. See the ViewNpyExt and ViewMutNpyExt extension traits. By [@n3vu0r] and [@jturner314].
• Added support for creating files larger than available memory with write_zeroed_npy.
• Improved handling of overflow in the number of bytes to read as specified by the shape and element type in the .npy file header. Before, if the number of bytes of data was more than isize::MAX, the implementation would attempt to create the array anyway and panic. Now, it detects this case before attempting to create the array and returns Err(ReadNpyError::LengthOverflow) instead.

• Updated to ndarray 0.14.
• Updated to Rust 1.42.

• Changed write_npy to take the array by reference instead of by value, by [@KarelPeeters].

• Updated to ndarray 0.13.
• Updated to Rust 1.38.
• Added read_npy and write_npy convenience functions.
• Added support for npy format version 3.0.
• Renamed ReadableElement::read_vec to ::read_to_end_exact_vec.
• Refactored the error types and variants, including removing the associated Error type from Readable/WritableElement and updating to the new style of std::error::Error implementation.
• Updated the padding calculation to make the total header length be divisible by 64 instead of just 16 when writing files. (See numpy/numpy#9025.)
• Fixed determination of file format version when the addition of padding changes the required version when writing the file.
• Fixed miscellaneous bugs related to overflow and error handling.

• Added support for reading/writing arrays of bool, by [@tobni] and [@jturner314].
• Updated to zip 0.5.
• Updated to Rust 1.32.
• Renamed the compressed_npz_default feature to compressed_npz because the zip crate no longer allows the user to select the compression backend.

• Updated to ndarray 0.12.
• Updated to num-traits 0.2 (replacing dependency on num).
• Updated to py_literal 0.2.

• Updated to zip 0.4.
• Made the compression backend for compressed .npz files user-selectable.
• Reworked how feature selection works. This should only affect you if you use default-features = false, features = ["compressed_npz"].

• Improved crate documentation (no functional changes).

• Initial release.