Importer¶

This add-on is meant to import graphical entities from another DXF drawing and their required table entries like LAYER, LTYPE or STYLE.

Because of complex extensibility of the DXF format and the lack of sufficient documentation, I decided to remove most of the possible source drawing dependencies from imported entities, therefore imported entities may not look the same as the original entities in the source drawing, but at least the geometry should be the same and the DXF file does not break.

Removed data which could contain source drawing dependencies: Extension Dictionaries, AppData and XDATA.

Warning

DON’T EXPECT PERFECT RESULTS!

The Importer supports following data import:

entities which are really safe to import: LINE, POINT, CIRCLE, ARC, TEXT, SOLID, TRACE, 3DFACE, SHAPE, POLYLINE, ATTRIB, ATTDEF, INSERT, ELLIPSE, MTEXT, LWPOLYLINE, SPLINE, HATCH, MESH, XLINE, RAY, DIMENSION, LEADER, VIEWPORT

table and table entry import is restricted to LAYER, LTYPE, STYLE, DIMSTYLE

import of BLOCK definitions is supported

import of paper space layouts is supported

Import of DXF objects from the OBJECTS section is not supported.

DIMSTYLE override for entities DIMENSION and LEADER is not supported.

Example:

import ezdxf
from ezdxf.addons import Importer

sdoc = ezdxf.readfile('original.dxf')
tdoc = ezdxf.new()

importer = Importer(sdoc, tdoc)

# import all entities from source modelspace into modelspace of the target drawing
importer.import_modelspace()

# import all paperspace layouts from source drawing
importer.import_paperspace_layouts()

# import all CIRCLE and LINE entities from source modelspace into an arbitrary target layout.
# create target layout
tblock = tdoc.blocks.new('SOURCE_ENTS')
# query source entities
ents = sdoc.modelspace().query('CIRCLE LINE')
# import source entities into target block
importer.import_entities(ents, tblock)

# This is ALWAYS the last & required step, without finalizing the target drawing is maybe invalid!
# This step imports all additional required table entries and block definitions.
importer.finalize()

tdoc.saveas('imported.dxf')

class ezdxf.addons.importer.Importer(source: Drawing, target: Drawing)¶

The Importer class is central element for importing data from other DXF drawings.

Parameters

source – source Drawing
target – target Drawing

Variables

source – source drawing
target – target drawing
used_layer – Set of used layer names as string, AutoCAD accepts layer names without a LAYER table entry.
used_linetypes – Set of used linetype names as string, these linetypes require a TABLE entry or AutoCAD will crash.
used_styles – Set of used text style names, these text styles require a TABLE entry or AutoCAD will crash.
used_dimstyles – Set of used dimension style names, these dimension styles require a TABLE entry or AutoCAD will crash.

finalize() → None¶: Finalize import by importing required table entries and block definition, without finalization the target drawing is maybe invalid fore AutoCAD. Call finalize() as last step of the import process.

import_block(block_name: str, rename=True) → str¶

Import one block definition. If block already exist the block will be renamed if argument rename is True, else the existing target block will be used instead of the source block. Required name resolving for imported block references (INSERT), will be done in Importer.finalize().

To replace an existing block in the target drawing, just delete it before importing: target.blocks.delete_block(block_name, safe=False)

Parameters

block_name – name of block to import
rename – rename block if exists in target drawing

Returns: block name (renamed)

Raises: ValueError – source block not found

import_blocks(block_names: Iterable[str], rename=False) → None¶

Import all block definitions. If block already exist the block will be renamed if argument rename is True, else the existing target block will be used instead of the source block. Required name resolving for imported block references (INSERT), will be done in Importer.finalize().

Parameters

block_names – names of blocks to import
rename – rename block if exists in target drawing

Raises

ValueError – source block not found

import_entities(entities: Iterable[DXFEntity], target_layout: BaseLayout = None) → None¶

Import all entities into target_layout or the modelspace of the target drawing, if target_layout is None.

Parameters

entities – Iterable of DXF entities
target_layout – any layout (modelspace, paperspace or block) from the target drawing

Raises

DXFStructureError – target_layout is not a layout of target drawing

import_entity(entity: DXFEntity, target_layout: BaseLayout = None) → None¶

Imports a single DXF entity into target_layout or the modelspace of the target drawing, if target_layout is None.

Parameters

entity – DXF entity to import
target_layout – any layout (modelspace, paperspace or block) from the target drawing

Raises

DXFStructureError – target_layout is not a layout of target drawing

import_modelspace(target_layout: BaseLayout = None) → None¶

Import all entities from source modelspace into target_layout or the modelspace of the target drawing, if target_layout is None.

Parameters: target_layout – any layout (modelspace, paperspace or block) from the target drawing
Raises: DXFStructureError – target_layout is not a layout of target drawing

import_paperspace_layout(name: str) → Layout¶

Import paperspace layout name into target drawing. Recreates the source paperspace layout in the target drawing, renames the target paperspace if already a paperspace with same name exist and imports all entities from source paperspace into target paperspace.

Parameters: name – source paper space name as string

Returns: new created target paperspace Layout

Raises

KeyError – source paperspace does not exist
DXFTypeError – invalid modelspace import

import_paperspace_layouts() → None¶: Import all paperspace layouts and their content into target drawing. Target layouts will be renamed if already a layout with same name exist. Layouts will be imported in original tab order.

import_table(name: str, entries: Union[str, Iterable[str]] = '*', replace=False) → None¶

Import specific table entries from source drawing into target drawing.

Parameters

name – valid table names are layers, linetypes and styles
entries – Iterable of table names as strings, or a single table name or * for all table entries
replace – True to replace already existing table entry else ignore existing entry

Raises

TypeError – unsupported table type

import_tables(table_names: Union[str, Iterable[str]] = '*', replace=False) → None¶

Import DXF tables from source drawing into target drawing.

Parameters

table_names – iterable of tables names as strings, or a single table name as string or * for all supported tables
replace – True to replace already existing table entries else ignore existing entries

Raises

TypeError – unsupported table type

recreate_source_layout(name: str) → Layout¶

Recreate source paperspace layout name in the target drawing. The layout will be renamed if name already exist in the target drawing. Returns target modelspace for layout name “Model”.

Parameters: name – layout name as string
Raises: KeyError – if source layout name not exist