DWG to DXF Conversion¶

ezdwg can convert DWG files to DXF format using ezdxf as the writing backend.

pip install "ezdwg[dxf]"

Basic Usage¶

From a File Path¶

import ezdwg

result = ezdwg.to_dxf("input.dwg", "output.dxf")
print(f"Written: {result.written_entities}/{result.total_entities}")

From a Document¶

doc = ezdwg.read("input.dwg")
result = doc.export_dxf("output.dxf")

From a Layout¶

doc = ezdwg.read("input.dwg")
msp = doc.modelspace()
result = msp.export_dxf("output.dxf")

Options¶

Filtering by Entity Type¶

result = ezdwg.to_dxf(
    "input.dwg",
    "output.dxf",
    types="LINE ARC LWPOLYLINE",
)

DXF Version¶

result = ezdwg.to_dxf(
    "input.dwg",
    "output.dxf",
    dxf_version="R2010",  # default
)

Supported DXF versions: R2000, R2004, R2007, R2010, R2013, R2018.

Strict Mode¶

In strict mode, conversion fails if any entity cannot be written:

result = ezdwg.to_dxf(
    "input.dwg",
    "output.dxf",
    strict=True,
)

ConvertResult¶

to_dxf() returns a ConvertResult with:

Attribute	Type	Description
`source_path`	`str`	Input DWG path
`output_path`	`str`	Output DXF path
`total_entities`	`int`	Total entities processed
`written_entities`	`int`	Entities successfully written
`skipped_entities`	`int`	Entities that could not be written
`skipped_by_type`	`dict[str, int]`	Skip counts grouped by type

Supported Entity Types¶

The following entity types can be written to DXF:

LINE, RAY, XLINE, POINT, ARC, CIRCLE, ELLIPSE, LWPOLYLINE, POLYLINE_2D, POLYLINE_3D, POLYLINE_MESH, POLYLINE_PFACE, 3DFACE, SOLID, TRACE, SHAPE, SPLINE, TEXT, ATTRIB, ATTDEF, MTEXT, LEADER, HATCH, TOLERANCE, MLINE, INSERT, MINSERT, DIMENSION

Limitations¶

Conversion is best-effort — some entities may be skipped if they cannot be represented in DXF.
Block definitions referenced by INSERT entities are reconstructed from the DWG source.
DIMENSION entities use native ezdxf dimension builders with a text fallback for unsupported subtypes.
Style, linetype, and layer properties may not be fully preserved.

Native DWG Writer (AC1015)¶

ezdwg also provides a native DWG writer for AC1015.

import ezdwg

result = ezdwg.to_dwg(
    "input.dwg",
    "output.dwg",
    version="AC1015",
    types="LINE ARC CIRCLE LWPOLYLINE TEXT MTEXT",
)
print(result.written_entities, result.skipped_by_type)

You can also call:

doc = ezdwg.read("input.dwg")
doc.export_dwg("output.dwg", version="AC1015")

Current native writer scope:

Version: AC1015 only
Entities: LINE, RAY, XLINE, POINT, ARC, CIRCLE, LWPOLYLINE, TEXT, MTEXT