Tranform sang Parquet-2

import sys
import datetime
import re
from awsglue.transforms import *
from awsglue.utils import getResolvedOptions
from pyspark.context import SparkContext
from awsglue.context import GlueContext
from awsglue.job import Job
glueContext = GlueContext(SparkContext.getOrCreate())
job = Job(glueContext)

## DONT FORGET TO PUT IN YOUR INPUT AND OUTPUT LOCATIONS BELOW.
your_database_name = "yourname-datalake-db"
your_table_name = "reviews"
output_location = "s3://yourname-0000-datalake/parquet/reviews/"

job.init("byod-workshop" + str(datetime.datetime.now().timestamp()))

#load our data from the catalog that we created with a crawler
dynamicF = glueContext.create_dynamic_frame.from_catalog(
    database = your_database_name,
    table_name = your_table_name,
    transformation_ctx = "dynamicF")

# invalid characters in column names are replaced by _
df = dynamicF.toDF()
def canonical(x): return re.sub("[ ,;{}()\n\t=]+", '_', x.lower())
renamed_cols = [canonical(c) for c in df.columns]
df = df.toDF(*renamed_cols)

# write our dataframe in parquet format to an output s3 bucket
df.write.mode("overwrite").format("parquet").save(output_location)

job.commit()