info = {
    'icon' : 'RENDER_STILL',
    'description' : 'render still image timed',
}

import bpy
import os
from os import listdir
from os.path import join, dirname, basename, exists, isfile, isdir, splitext
import re, fnmatch, glob
from mathutils import Vector, Matrix
from math import radians, degrees
from time import time
import datetime

C = bpy.context
D = bpy.data
scn = scene = C.scene
rd = scn.render



def pad_with_current_frame(match):
    return str(C.scene.frame_current).zfill(len(match.group(0)))

def add_frame_padding(name):
    '''
    return string padded with current blender frame
    if # found, use this padding to write theframe
    '''
    import re
    if not '#' in name: return name + str(C.scene.frame_current).zfill(4)
    # return re.sub(r'\#{1,10}', pad_with_current_frame, name)# all '#...' in string
    return re.sub(r'\#{1,10}(?!.*\#)', pad_with_current_frame, name)# only last '#...'


def render(anim=False, GL=False):
    if GL:#openGl render
        bpy.ops.render.opengl(animation=anim, write_still=True, view_context=True)#view_context False > look throughcam
    else:
        bpy.ops.render.render(animation=anim, write_still=True)

start = time()

orgfp = C.scene.render.filepath
C.scene.render.filepath = add_frame_padding(C.scene.render.filepath)

try:
    render(anim=False)
except Exception as e:
    print(e)
finally:
    C.scene.render.filepath = orgfp

secs = time() - start
timesec_str = f'elapsed {secs} seconds'
time_str = str(datetime.timedelta(seconds=secs))

print(timesec_str)
print(time_str)
C.window_manager.clipboard = time_str