Python svg to dxf

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To convert an SVG (Scalable Vector Graphics) file to a DXF (Drawing Exchange Format) file using Python, you can make use of libraries such as pyautocad, svgwrite, and ezdxf. These libraries provide functionalities to read and write SVG and DXF files respectively. Here’s a detailed explanation of how you can accomplish this task with an example:

  1. Install the required libraries by running the following commands in your terminal or command prompt: 

            $ pip install pyautocad svgwrite ezdxf

  2. Create a Python script and import the necessary libraries:

            import os
import svgwrite
import ezdxf

  3. Read the SVG file using svgwrite and extract its contents. Make sure the SVG file you want to convert is in the same directory as your Python script or provide the full path to the file: 

            input_svg = 'example.svg'
svg = svgwrite.Drawing(filename=input_svg, debug=False)
svg.contents.load(input_svg)

  4. Create a DXF drawing object using ezdxf:

            output_dxf = 'example.dxf'
drawing = ezdxf.new(input_svg)

  5. Iterate over the SVG elements and convert them to corresponding DXF entities using pyautocad. This step involves analyzing the SVG element types and attributes, then mapping them to DXF entities: 

            for element in svg.elements:
    attributes = element.attrib
    
    # Convert respective SVG elements to DXF entities
    if element.tag == 'rect':
        rect = drawing.add(rectangle=(float(attributes['x']), float(attributes['y'])),
                           width=float(attributes['width']),
                           height=float(attributes['height']))
                            
        # Set other attributes of the rectangle if needed
        rect['layer'] = 'svg_to_dxf'
    elif element.tag == 'line':
        line = drawing.add(line=(float(attributes['x1']), float(attributes['y1'])),
                           (float(attributes['x2']), float(attributes['y2'])))
                           
        # Set other attributes of the line if needed
        line['layer'] = 'svg_to_dxf'
        
    # Add more conditional statements for other SVG element types
        
# Save the DXF file
drawing.saveas(output_dxf)

In the above example, we read an SVG file named “example.svg” using svgwrite library. We then create a new DXF drawing using ezdxf library. Next, we iterate over the SVG elements and create corresponding DXF entities. For simplicity, we have only considered “rect” and “line” elements, but you can extend the code to handle other SVG elements as well. Lastly, we save the resulting DXF file as “example.dxf”.

Remember to import all the required libraries and modify the code as per your SVG file’s structure and requirements.

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