JoanTheSpark/ezdxf

ezdxf

Abstract

A Python package to create and modify DXF drawings, independent from the DXF version. You can open/save every DXF file without loosing 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 Python 2.7 or later, runs on CPython and pypy, maybe on IronPython and Jython
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.