A Python package to create/manipulate DXF drawings.
Project description
ezdxf
Abstract
A Python package to create and modify DXF drawings, independent from the DXF version. You can open/save every DXF file without losing any content (except comments), Unknown tags in the DXF file will be ignored but preserved for saving. With this behavior it is possible to open also DXF drawings that contains data from 3rd party applications.
Quick-Info
ezdxf is a Python package to create new DXF files and read/modify/write existing DXF files
the intended audience are developers
requires at least CPython 3.5, support for Python 2 will be dropped with ezdxf v0.9.0
OS independent
additional required packages: pyparsing
MIT-License
read/write/new support for DXF versions: R12, R2000, R2004, R2007, R2010, R2013 and R2018
additional read support for DXF versions R13/R14 (upgraded to R2000)
additional read support for older DXF versions than R12 (upgraded to R12)
preserves third-party DXF content
additional fast DXF R12 writer, that creates just an ENTITIES section with support for the basic DXF entities
a simple example:
import ezdxf drawing = ezdxf.new(dxfversion='AC1024') # or use the AutoCAD release name ezdxf.new(dxfversion='R2010') modelspace = drawing.modelspace() modelspace.add_line((0, 0), (10, 0), dxfattribs={'color': 7}) drawing.layers.new('TEXTLAYER', dxfattribs={'color': 2}) # use set_pos() for proper TEXT alignment - the relations between halign, valign, insert and align_point are tricky. modelspace.add_text('Test', dxfattribs={'layer': 'TEXTLAYER'}).set_pos((0, 0.2), align='CENTER') drawing.saveas('test.dxf')
example for the r12writer, writes a simple DXF R12 file without in-memory structures:
from random import random from ezdxf.r12writer import r12writer MAX_X_COORD = 1000.0 MAX_Y_COORD = 1000.0 CIRCLE_COUNT = 100000 with r12writer("many_circles.dxf") as dxf: for i in range(CIRCLE_COUNT): dxf.add_circle((MAX_X_COORD*random(), MAX_Y_COORD*random()), radius=2)
The r12writer supports only the ENTITIES section of a DXF R12 drawing, no HEADER, TABLES or BLOCKS section is present, except FIXED-TABLES are written, than some additional predefined text styles and line types are available.
Installation
Install with pip:
pip install ezdxf
Install develop version (only if you have to):
pip install git+https://github.com/mozman/ezdxf.git@develop
or from source:
python setup.py install
Website
Documentation
Documentation of development version at https://ezdxf.mozman.at/docs
Documentation of latest release at http://ezdxf.readthedocs.io/
Contribution
The source code of ezdxf can be found at GitHub.com:
http://github.com/mozman/ezdxf.git
Only pull requests for the develop branch will be accepted.
Feedback
Issue Tracker at:
http://github.com/mozman/ezdxf/issues
Questions and Feedback at Google Groups:
https://groups.google.com/d/forum/python-ezdxf
Feedback is greatly appreciated.
Manfred
Contact
News
Latest versions of ezdxf (>= 0.9.0) are not Python 2 compatible
Version 0.8.10b2 - dev
BUGFIX release for Python 2 compatible main version 0.8
renamed groups.py into dxfgroups.py to avoid confilicts with cython
added encoding to files containing utf-8 characters (chr15m)
Version 0.8.9 - 2018-11-28
Release notes: https://ezdxf.mozman.at/release-v0-8-9.html
IMPORTANT: Python 2 support will be dropped in ezdxf v0.9.0, because Python 2 support get more and more annoying.
CHANGE: refactoring of internal tag representation for a smaller memory footprint, but with some speed penalty
NEW: packed data for LWPOLYLINE points, faster __getitem__; added __setitem__, __delitem__, insert() and append() methods; renamed discard_points() in clear(); removed get_rstrip_points() and ctx manager rstrip_points(); user defined point format;
NEW: packed data for SPLINE, knots, weights, fit- and control points are stored as array.array(); Spline.get_knot_values(), Spline.get_weights(), Spline.get_control_points() and Spline.get_fit_points() are deprecated, direct access to this attributes by Spline.knot_values, Spline.weights, Spline.control_points and Spline.fit_points, all attributes with a list-like interface. Knot, control point and fit point counter updated automatically, therefore counters are read only now.
NEW: packed data for MESH, vertices, faces, edges and edge crease values stored as array.array(), high level interface unchanged
NEW: Drawing.layouts_and_blocks(), iterate over all layouts (mode space and paper space) and all block definitions.
NEW: Drawing.chain_layouts_and_blocks(), chain entity spaces of all layouts and blocks. Yields an iterator for all entities in all layouts and blocks
NEW: Drawing.query(), entity query over all layouts and blocks
NEW: Drawing.groupby(), groups DXF entities of all layouts and blocks by an DXF attribute or a key function
NEW: Layout.set_redraw_order() and Layout.get_redraw_order(), to change redraw order of entities in model space and paper space layouts
NEW: BlockLayout.is_layout_block, True if block is a model space or paper space block definition
NEW: ezdxf.algebra.Arc helper class to create arcs from 2 points and an angle or radius, or from 3 points
NEW: ezdxf.algebra.Arc.add_to_layout() with UCS support to create 3D arcs
NEW: rename paper space layouts by Drawing.layouts.rename(old_name, new_name)
NEW: Basic support for embedded objects (new in AutoCAD 2018), ezdxf reads and writes the embedded data as it is, no interpretation no modification, just enough to not break DXF files with embedded objects at saving.
CHANGE: Drawing.blocks.delete_block(name, safe=True), new parameter save, check if block is still referenced (raises DXFValueError)
CHANGE: Drawing.blocks.delete_all_blocks(safe=True), if parameter safe is True, do not delete blocks that are still referenced
BUGFIX: invalid CLASS definition for DXF version R2000 (AC1015) fixed, bug was only triggered at upgrading from R13/R14 to R2000
BUGFIX: fixed broken Viewport.AcDbViewport property
Basic read support for many missing DXF entities/objects
ACAD_PROXY_GRAPHIC
HELIX
LEADER
LIGHT
MLEADER (incomplete)
MLINE (incomplete)
OLEFRAME
OLE2FRAME
SECTION
TABLE (incomplete)
TOLERANCE
WIPEOUT
ACAD_PROXY_OBJECT
DATATABLE
DICTIONARYVAR
DIMASSOC
FIELD (incomplete)
FIELDLIST (not documented by Autodesk)
IDBUFFER
LAYER_FILTER
MATERIAL
MLEADERSTYLE
MLINESTYLE
SORTENTSTABLE
SUN
SUNSTUDY (incomplete) (no real world DXF files with SUNSTUDY for testing available)
TABLESTYLE (incomplete)
VBA_PROJECT (no real world DXF files with embedded VBA for testing available)
VISUALSTYLE
WIPEOUTVARIABLES
for all unsupported entities/objects exist only raw DXF tag support
Version 0.8.8 - 2018-04-02
Release notes: https://ezdxf.mozman.at/release-v0-8-8.html
NEW: read/write support for GEODATA entity
NEW: read/(limited)write support for SURFACE, EXTRUDEDSURFACE, REVOLVEDSURFACE, LOFTEDSURFACE and SWEPTSURFACE entity
NEW: support for extension dictionaries
NEW: add_spline_control_frame(), create and add B-spline control frame from fit points
NEW: add_spline_approx(), approximate B-spline by a reduced count of control points
NEW: ezdxf.setup_linetypes(dwg), setup standard line types
NEW: ezdxf.setup_styles(dwg), setup standard text styles
NEW: LWPolyline.vertices() yields all points as (x, y) tuples in OCS, LWPolyline.dxf.elevation is the z-axis value
NEW: LWPolyline.vertices_in_wcs() yields all points as (x, y, z) tuples in WCS
NEW: basic __str__() and __repr__() support for DXF entities, returns just DXF type and handle
NEW: bulge related function in module ezdxf.algebra.bulge
NEW: Object Coordinate System support by DXFEntity.ocs() and OCS() class in module ezdxf.algebra
NEW: User Coordinate System support by UCS() class in module ezdxf.algebra
CHANGE: DXFEntity.set_app_data() and Entity.set_xdata accept also list of tuples as tags, DXFTag() is not required
BUGFIX: entity structure validator excepts group code >= 1000 before XDATA section (used in AutoCAD Civil 3D and AutoCAD Map 3D)
Version 0.8.7 - 2018-03-04
Release notes: https://ezdxf.mozman.at/release-v0-8-7.html
NEW: entity.get_layout() returns layout in which entity resides or None if unassigned
NEW: copy any DXF entity by entity.copy() without associated layout, add copy to any layout you want, by layout.add_entity().
NEW: copy entity to another layout by entity.copy_to_layout(layout)
NEW: move entity from actual layout to another layout by entity.move_to_layout(layout)
NEW: support for splines by control points: add_open_spline(), add_closed_spline(), add_rational_spline(), add_closed_rational_spline()
NEW: bspline_control_frame() calculates B-spline control points from fit points, but not the same as AutoCAD
NEW: R12Spline add-on, 2d B-spline with control frame support by AutoCAD, but curve is just an approximated POLYLINE
NEW: added entity.get_flag_state() and entity.set_flag_state() for easy access to binary coded flags
NEW: set new $FINGERPRINTGUID for new drawings
NEW: set new $VERSIONGUID on saving a drawing
NEW: improved IMAGE support, by adding RASTERVARIABLES entity, use Drawing.set_raster_variables(frame, quality, units)
BUGFIX: closing user defined image boundary path automatically, else AutoCAD crashes
Version 0.8.6 - 2018-02-17
Release notes: https://ezdxf.mozman.at/release-v0-8-6.html
NEW: ezdxf project website: https://ezdxf.mozman.at/
CHANGE: create all missing tables of the TABLES sections for DXF R12
BUGFIX: entities on new layouts will be saved
NEW: Layout.page_setup() and correct ‘main’ viewport for DXF R2000+; For DXF R12 page_setup() exists, but does not provide useful results. Page setup for DXF R12 is still a mystery to me.
NEW: Table(), MText(), Ellipse(), Spline(), Bezier(), Clothoid(), LinearDimension(), RadialDimension(), ArcDimension() and AngularDimension() composite objects from dxfwrite as add-ons, these add-ons support DXF R12
NEW: geometry builder as add-ons: MeshBuilder(), MeshVertexMerger(), MengerSponge(), SierpinskyPyramid(), these add-ons require DXF R2000+ (MESH entity)
BUGFIX: fixed invalid implementation of context manager for r12writer
Version 0.8.5 - 2018-01-28
Release notes: https://ezdxf.mozman.at/release-v0-8-5.html
CHANGE: block names are case insensitive ‘TEST’ == ‘Test’ (like AutoCAD)
CHANGE: table entry (layer, linetype, style, dimstyle, …) names are case insensitive ‘TEST’ == ‘Test’ (like AutoCAD)
CHANGE: raises DXFInvalidLayerName() for invalid characters in layer names: <>/":;?*|=`
CHANGE: audit process rewritten
CHANGE: skip all comments, group code 999
CHANGE: removed compression for unused sections (THUMBNAILSECTION, ACDSDATA)
NEW: write DXF R12 files without handles: set dwg.header[‘$HANDLING’]=0, default value is 1
added subclass marker filter for R12 and prior files in legacy_mode=True (required for malformed DXF files)
removed special check for Leica Disto Unit files, use readfile(filename, legacy_mode=True) (malformed DXF R12 file, see previous point)
Version 0.8.4 - 2018-01-14
Release notes: https://ezdxf.mozman.at/release-v0-8-4.html
NEW: Support for complex line types with text or shapes
NEW: DXF file structure validator at SECTION level, tags outside of sections will be removed
NEW: Basic read support for DIMENSION
CHANGE: improved exception management, in the future ezdxf should only raise exceptions inherited from DXFError for DXF related errors, previous exception classes still work
DXFValueError(DXFError, ValueError)
DXFKeyError(DXFError, KeyError)
DXFAttributeError(DXFError, AttributeError)
DXFIndexError(DXFError, IndexError)
DXFTableEntryError(DXFValueError)
speedup low level tag reader around 5%, and speedup tag compiler around 5%
Version 0.8.3 - 2018-01-02
CHANGE: Lwpolyline - suppress yielding z coordinates if they exists (DXFStructureError: z coordinates are not defined in the DXF standard)
NEW: setup creates a script called ‘dxfpp’ (DXF Pretty Printer) in the Python script folder
NEW: basic support for DXF format AC1032 introduced by AutoCAD 2018
NEW: ezdxf use logging and writes all logs to a logger called ‘ezdxf’. Logging setup is the domain of the application!
NEW: warns about multiple block definitions with the same name in a DXF file. (DXFStructureError)
NEW: legacy_mode parameter in ezdxf.read() and ezdxf.readfile(): tries do fix coordinate order in LINE entities (10, 11, 20, 21) by the cost of around 5% overall speed penalty at DXF file loading
Version 0.8.2 - 2017-05-01
NEW: Insert.delete_attrib(tag) - delete ATTRIB entities from the INSERT entity
NEW: Insert.delete_all_attribs() - delete all ATTRIB entities from the INSERT entity
BUGFIX: setting attribs_follow=1 at INSERT entity before adding an attribute entity works
Version 0.8.1 - 2017-04-06
NEW: added support for constant ATTRIB/ATTDEF to the INSERT (block reference) entity
NEW: added ATTDEF management methods to BlockLayout (has_attdef, get_attdef, get_attdef_text)
NEW: added (read/write) properties to ATTDEF/ATTRIB for setting flags (is_const, is_invisible, is_verify, is_preset)
Version 0.8.0 - 2017-03-28
added groupby(dxfattrib=’’, key=None) entity query function, it is supported by all layouts and the query result container: Returns a dict, where entities are grouped by a dxfattrib or the result of a key function.
added ezdxf.audit() for DXF error checking for drawings created by ezdxf - but not very capable yet
dxfattribs in factory functions like add_line(dxfattribs=…), now are copied internally and stay unchanged, so they can be reused multiple times without getting modified by ezdxf.
removed deprecated Drawing.create_layout() -> Drawing.new_layout()
removed deprecated Layouts.create() -> Layout.new()
removed deprecated Table.create() -> Table.new()
removed deprecated DXFGroupTable.add() -> DXFGroupTable.new()
BUFIX in EntityQuery.extend()
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