Basic way to export props of a geo node in Houdini into Json.

houdini_json_geo_export.py

import json, os

# adapted from here with minor tweaks
# https://github.com/sideeffects/GameDevelopmentToolset/blob/Development/otls/rop_csv_exporter.hda/gamedev_8_8Driver_1rop__csv__exporter/PythonModule#L43
# needs a bit more work to make it better but works well enough for now. 


node = hou.pwd()
geo = node.geometry()
filename = "./tester.json"
separator = ","

def export(node):

    # Gather some data from the parameters 
    node_name = "scatter1"
    csv_path = filename
    
    # determines whether or not to write each component separately or 
    # to group components together into a string form 
    # ie for example writing out x,y,z,w vs writing out "(x,y,z,w)"
    separate_components = True;
    
    # not foolproof but helps to append and x,y,z value to attributes like P
    suffix_x = "x"
    suffix_y = "y"
    suffix_z = "z"
    suffix_w = "w"
    component_suffixes = [suffix_x, suffix_y, suffix_z, suffix_w]

    
    if not os.path.exists(os.path.dirname(csv_path)):
        os.makedirs(os.path.dirname(csv_path))

        

    ExportAttributes = [x.name() for x in geo.pointAttribs()]     
    with open(csv_path, 'wb') as csvfile:
    
 
        attributes = []
        
     
        # setup attributes buffer with names of all properties. 
        for point_attr_name in ExportAttributes:
      
            
            point_attr = None
            if geo.findPointAttrib(point_attr_name) != None:
                point_attr = geo.findPointAttrib(point_attr_name)
                attributes.append({
                    "attrib":point_attr.name(),
                    "data":[]
                })
        
      
        # append data to the appropriate attributes 
        for point in geo.points():
        
            # build an array of data for each attribute 
            point_data = []
                
            for point_attr_name in ExportAttributes:
                point_attr = None
                if geo.findPointAttrib(point_attr_name) != None:
                    point_attr = geo.findPointAttrib(point_attr_name)
                    
                    for attr in attributes:
                        if point_attr.name() == attr["attrib"]:
                        

                            if separate_components and point_attr.size()>1:
                                for i in range(point_attr.size()):
                                    attr["data"].append(point.attribValue(point_attr)[i])
                                    
                            else:
                                attr["data"].append(point.attribValue(point_attr))
            
                                
                        
        json.dump(attributes,csvfile)  
export(node)