pyspark-profile-udf. Add simple udf profiler for pyspark.

Requirements
1. flameprof
```
pip install flameprof
```

How to use

Rename this project to pyspark
Compress this project to pyspark.zip: zip -r pyspark pyspark And move it to $SPARK_HOME/python/lib
Enable pyspark profile in your application code, and set the profile dump path

spark_session = SparkSession \
      .builder \
      .appName("Python Arrow-in-Spark profile") \
      .config("spark.python.profile", "true") \
      .config("spark.python.profile.dump", profile_dump_path) \
      .getOrCreate()