1.6.0

Release 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.

Full Changelog: 1.5.0...1.6.0

1.5.0

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

Fix readthedocs documentation build

1.4.0

• 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