zipfile39 0.0.1.1

Backport of zipfile Python 3.9 to Python 2.7 with some enhancements

## zipfile39

• Backport of zipfile Python 3.9 (especially caae717) to older Python including Python 2.7.

• Uses backports.lzma for ZIP_LZMA (method 14) Python2 handler.

• Introduces ZIP_DEFLATED64 (method 9), ZIP_ZSTANDARD(method 93), ZIP_XZ (method 95) and ZIP_PPMD (method 98) handlers.

  • ZIP_ZSTANDARD Python2 uses zstandard 0.14.1 (the last compatible version).

  • Due to bindings availability, DEFLATED64 and PPMD are Python3 only.

• If isal is installed:

  • crc32 and inflation are accelerated automatically.

  • compresslevel -1, -2 and -3 are available, which correspond to isal compression level 1, 2 and 3.

• Installation requisites:

  • pathlib2 (Python2 only)

  • contextlib2 (Python2 only)

• Optional requisites:

  • backports.lzma (Python2 only)

  • zstandard

• Optional requisites (only available for Python3):

  • pyppmd (currenty need python3 -m pip install git+https://github.com/cielavenir/pyppmd@zipfile39_compatible)

  • zipfile_deflate64

  • isal