DWG source by Python

Question

I want to automize my routine tasks such as changing 1 word in huge AutoCAD .DWG file with a lot of text blocks (objects in autocad). So, can I open it by Python? And how?

with open('yourfile.dwg', 'r') as f: this way you have it open for reading, check python.org for more documentation — Drako, Oct 05 '18 at 11:37
@Drako "No results found." after search on python.org "dwg". — Artem Getmanskiy, Oct 05 '18 at 11:38
@FlyingTeller blocks of text in dwg, it's an objects, but i don't know what kind of and how to parse it. I now Python, and, ofc, know open() function :) — Artem Getmanskiy, Oct 05 '18 at 11:43
Drako is right, that line *will open the file*. But if you need to know how to parse it, you must investigate that on your own. Nobody is going to write a full file format parser for you. — Jongware, Oct 05 '18 at 11:44
Looks like `dwg` does not have public specifications, so you will probably not find any freely available library to open it — FlyingTeller, Oct 05 '18 at 11:44
open it binary and replace - should work fine, but needs testing — Drako, Oct 05 '18 at 11:55

score 3 · Accepted Answer · answered Oct 05 '18 at 11:44

3

Your best bet here is to convert the file first into something like SVG or .dxf and go from there. It's not easy getting the data from a .dwg file in python.

You can make the conversion to SVG in python too using subprocess and a command line convert tool like cad2svg.

answered Oct 05 '18 at 11:44

Nordle

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Thanks! I've found info 'bout SVG. Can u give me the way 'bout working with .dxf for further research, plz? – Artem Getmanskiy Oct 05 '18 at 11:46
Take a look at this convertor - https://www.opendesign.com/guestfiles/TeighaFileConverter to make the conversion, and within python you could look to the `dxfgrabber` library to handle the file. – Nordle Oct 05 '18 at 11:48
Thank you for help! – Artem Getmanskiy Oct 05 '18 at 11:50

DWG source by Python

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