code: def main(unused_argv):
      writer = tf.summary.create_file_writer("demo_logs")
      with writer.as_default():
          for i in range(100):
              tf.summary.scalar("custom_tag", 100 * math.sin(i), step=i)
  
imports: import math
  from absl import app
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: main(unused_argv) without return types