import os.path
from collections import defaultdict
# extensions from http://en.wikipedia.org/wiki/List_of_file_formats#Computer-aided_design_.28CAD.29
# + fc*, brep, stp, idv
#: a set of CAD file extensions, all values are in lowercase and starts with a dot.
CAD_FORMATS = set((
".3dmlw", ".3dxml",
".acp", ".amf", ".ar", ".art", ".asc", ".asm", ".bin", ".bim",
".ccc", ".ccm", ".ccs", ".cad", ".catdrawing", ".catpart",
".catproduct", ".catprocess", ".cel", ".cgr", ".co",
".drw", ".dwg", ".dft", ".dgn", ".dgk", ".dmt", ".dxf", ".dwb", ".dwf",
".emb", ".esw", ".excellon", ".exp", ".fm", ".fmz",
".g", ".gerber", ".grb", ".gtc",
".iam", ".icd", ".idv", ".idw", ".ifc", ".iges", ".ipn", ".ipt", ".jt",
".mcd", ".model", ".ocd",
".par", ".prt", ".pln", ".psm", ".psmodel", ".pwi", ".pyt",
".rlf", ".rvt", ".rfa",
".scdoc", ".skp", ".sldasm", ".slddrw", ".sldprt", ".step", ".stp", ".stl",
".tct", ".tcw", ".unv", ".vc6", ".vlm", ".vs", ".wrl", ".xe",
".fcstd", ".fmacro", ".fscript", ".brep", ".brp",
))
[docs]def is_cad_file(filename):
"""
Returns True if *filename* is a CAD file.
Only tests if its extension is in :const:`CAD_FORMATS`.
"""
name, ext = os.path.splitext(filename)
return ext.lower() in CAD_FORMATS
native_to_standards = defaultdict(tuple)
native_to_standards.update(
(
(u'.fcstd', (u'.step', u'.stp')),
(u'.catproduct', (u'.step', u'.stp')),
(u'.catpart', (u'.step', u'.stp')),
))
