ModuleNotFoundError: No module named 'spark_tree_plotting'

[mengyao00]

The online method doesn't work, so I use the offline method to install, I start a session like this: spark = SparkSession \
.builder \
.appName("Python Spark SQL basic example") \
.config("spark.jars","/Users/timmy/lala/spark/spark-3.0.0-preview-bin-hadoop2.7/my_example/2020spring_datamining/spark-tree-plotting/target/scala-2.11/spark-tree-plotting_0.2.jar")\
.getOrCreate()

then I got an error: from spark_tree_plotting import plot_tree ModuleNotFoundError: No module named 'spark_tree_plotting'