pyspark 添加UUID

import pyspark.sql.functions as f
from pyspark.sql.types import StringType

# method 1 use udf 
uuid_udf = f.udf(lambda : str(uuid.uuid4().hex), StringType())
df_with_uuid = df.withColumn('uuid', uuid_udf())

# method 2 use lit 
df_with_uuid = df.withColumn('uuid', f.lit(uuid.uuid4().hex))

code来源：https://elegantdata.blogspot.com/2021/03/add-uuid-column-to-spark-dataframe.html?lr=1

方法简述

上述两种添加uuid的方法第一种正确：
result method1：

result method2：