C4D Activate Camera on Frame Tag

gistfile1.py

import c4d
import re

"""
1. Create python tag on camera and add this code to it.
2. Duplicate tag to other cameras.
3. Rename your camera layers to match the frame you want it be be active on, e.g., cam-1, Camera01, 01.
"""

def main():
    cam = op.GetObject()
    bd = doc.GetActiveBaseDraw()
    frame = doc.GetTime().GetFrame(doc.GetFps())
    cam_name = cam.GetName()
    cam_frame = int((re.findall('\d+', cam_name))[0])
    
    if frame == cam_frame:
        bd.SetSceneCamera(cam)
        c4d.EventAdd()