QGIS3: Create new equidistant points along a line based on attribute data

PointAlongLine.py

#Script adapted#
#QGIS Python API 3.0#

from qgis.core import *

def create_points(feat,writer):
    geometry = feat.geometry()
    if not geometry:
        return
    length = geometry.length()
    # -----------------
    # change 'n_points' to match your field name for the number of points field
    # -----------------
    num_points = feat['n_points']
    delta = length / ( num_points + 1.0 )
    distance = 0.0
    for i in range(num_points):
        distance += delta
        output_feature = QgsFeature(feat)
        output_feature.setGeometry( geometry.interpolate(distance) )
        writer.addFeature(output_feature)

layer = iface.activeLayer()

# ---------------
# change '/path/points.shp' to desired output file name
# ---------------

writer = QgsVectorFileWriter('/path/points.shp', None, layer.fields(), QgsWkbTypes.Point, layer.crs())

for f in layer.getFeatures():
    create_points(f,writer)

del writer