code: def read_image_bytes_base64(path):
      with open(path, "rb") as f:
          return str(base64.encodebytes(f.read()), encoding="utf8")
  
file_path: mlflow/examples/flower_classifier/score_images_spark.py
imports: import base64
  import os
  import click
  import pandas
  import pyspark
  from pyspark.sql.types import ArrayType, Row, StringType, StructField, StructType
  import mlflow
  import mlflow.pyfunc
  from mlflow.utils import cli_args
label_desc: Use image node_id 1 for calling a global function with example usage: read_image_bytes_base64(path) and returns: str