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CHANGELOG.md

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Changelog for pyodc

1.6.0

  • pip install pyodc will now install the C++ backend so codc will work immediately.
    • The C++ backed is now installable with pip from odclib.
    • Added findlibs and odclib as dependencies.
    • To force the use of a different odc shared library, set the environment variable ODC_DIR to the directory containing the shared library. See the findlibs documentation for more information.

1.5.0

  • Add a new LongConstantString codec which permits encoding constant columns where the constant is a string > 8 characters in length.

    • This saves 1 byte per row compared the previous way these columns were encoded.
    • A C++ implementation has been added to ODC at the same time, version 1.6.0
    • Bumped required ODC version to 1.6.0 for feature parity.
    • Decoding data using this codec will work straight away.
    • Encoding data with the new codec is disabled by default and can be enabled with the environment variable "ODC_ENABLE_WRITING_LONG_STRING_CODEC=1".
    • At some point in a future release, encoding will be enabled by default.

  • Accept various new datatypes and tighten datatype selection logic (fixes ODB-559):

    • Unsigned Integers: uint8 - uint32 (note uint64 is not supported).
    • Signed Integers: int8 - int64.
    • Float32 in addition to float64.
    • Fixed the selection logic for ShortReal2 and ShortReal codecs so the smallest positive normal float32 number struct.unpack("<f", b"\x00\x00\x80\x00")[0] can now be used in data.

  • Converted to a pyproject.toml based package.

  • Fix various warnings:

    • Pandas Deprecation warning about df.dtypes[0] needing to become df.dtypes.iloc[0].
    • Pandas Deprecation warning about converting implicitly converting dataframe column dtype.
    • Pandas Future Warning about concatenation with empty or all-NA dataframes.
    • "pkg_resources is deprecated as an API."

1.4.1

  • Use findlibs instead of custom finder for odc
  • Support constant bitfields
  • Correct encoding with constant strings > 8 characters in length
  • Support pandas native string type
  • Fix access to exploded bitfield columns

1.1.3

  • Improved github/ci integration

1.1.2

  • Fixed #6: pip install breaks codc

1.1.1

  • Fixed ODB-534: PyPI package is missing CHANGELOG

1.1.0

  • Fixed ODB-533: Decode data starting with missing values correctly
  • Fixed ODB-530: Bitfield column inspection returns incomplete data in pure-Python implementation
  • Bumped up required odc version number to 1.4.0
  • Added missing frame properties accessor to codc interface
  • Fixed ODB-525: Setting odc prefix variable (odc_DIR) does not work as expected on macOS
  • Fixed ODB-524: Keys and values in decoded frame properties are switched on older Python version
  • Added test flag to skip codc tests on demand (PYODC_SKIP_CODC)
  • Fixed ODB-523: Additional properties parameter is omitted in encode_odb() when string is passed as file
  • Fixed package setup metadata
  • Added documentation

1.0.4

  • Correct support for constant codecs
  • Decoding by column short name

1.0.3

  • Specify odc library location with odc/ODC_DIR
  • Correct setup.py dependencies to include pandas
  • Support missing ConstantString values encoded from ODB1 using the odb_migrator

1.0.2

  • String missing values should be None not NaN
  • Refactor oneshot behaviour (read_odb_oneshot --> read_odb(..., single=True))
  • Raise correct error on odc not found
  • Split codb.py into a full codc module
  • Fix miscellaneous bugs

1.0.1

  • Fixed automatic selection of integral codecs

1.0.0

  • Initial version