full pythonic re for VkFormat

VkFormat_regex.py

FORMAT_REGEX = re.compile(r'''
VK_FORMAT
(?:
        # NVIDIA optical flow
        _R16G16_S10_5_NV
    |
        # PVRTC
        _(?P<pvrtc>PVRTC[12])
        _(?P<pvrtc_bpp>[24])BPP
        _(?P<pvrtc_numeric_format>UNORM|SRGB)
        _BLOCK
        _IMG
    |
        # ASTC
        _(?P<astc>ASTC)
        _(?P<astc_width>[4568]|10|12)x(?P<astc_height>[4568]|10|12)
        _(?P<astc_numeric_format>UNORM|SRGB|SFLOAT)
        _BLOCK
    |
        # EAC
        _(?P<eac>EAC)
        _(?P<eac_components>R11|R11G11)
        _(?P<eac_numeric_format>UNORM|SNORM)
        _BLOCK
    |
        # ETC2
        _(?P<etc>ETC2)
        _(?P<etc_components>R8G8B8|R8G8B8A[18])
        _(?P<etc_numeric_format>UNORM|SRGB)
        _BLOCK
    |
        # BC
        _(?P<bc>BC(?:[123457]|6H))
        (?:_(?P<bc_components>RGB|RGBA))?
        _(?P<bc_numeric_format>UNORM|SRGB|SNORM|UFLOAT|SFLOAT)
        _BLOCK
    |
        # Depth and|or stencil
        (?:
            (?:_X(?P<depth_padding>8))?
            _D(?P<depth_bits>16|24|32)
            _(?P<depth_numeric_format>UNORM|SFLOAT)
        )?
        (?:
            _S(?P<stencil_bits>8)
            _(?P<stencil_numeric_format>UINT)
        )?
        (?:_PACK(?P<depth_pack>32))?
    |
        # all image formats including multiplane
        _(?P<component0>[ERGBA])(?P<component0bits>1|2|4|5|6|8|9|10|12|16|32|64)(?:X(?P<component0padding>[46]))?
        (?:(?P<plane1>_)?(?P<component1>[RGB])(?P<component1bits>4|5|6|8|9|10|11|12|16|32|64)(?:X(?P<component1padding>[46]))?)?
        (?:(?P<plane2>_)?(?P<component2>[RGB])(?P<component2bits>4|5|6|8|9|10|11|12|16|32|64)(?:X(?P<component2padding>[46]))?)?
        (?:(?P<component3>[RGBA])(?P<component3bits>1|4|5|6|8|9|10|12|16|32|64)(?:X(?P<component3padding>[46]))?)?
        (?:_(?P<plane_count>[23])PLANE)?
        (?:_(?P<chroma>420|422|444))?
        _(?P<numeric_format>USCALED|UINT|UFLOAT|SINT|SFLOAT|SSCALED|SRGB|SNORM|UNORM)
        (?:_(?P<batch>[234])?PACK(?P<pack>8|16|32))?
)$
''', re.VERBOSE)