Remove Non-ASCII characters from S3 file using Glue

Question

I have a CSV file delivered by external vendor, to S3 and this file has some Non-ASCII/Junk characters. Before loading this to redahft table, I will need to remove these characters. I tried TRIMBLANKS in COPY command and that didn't help. When opening this CSV file in notepads++, it's showing as space. After selecting "show hidden characters" these space is shown as "."
I tried calling this file in glue studio and using pyspark code, I am getting error. Can anyone please help me on this. Can it be rectified in COPY command or AWS glue or LAMBDA?
I am new to lambda.

**Sample data:** 003800019779                                                                                                                                                                                                                                                  
 **Code used by me: **                                                                                                                                                                                                                                                 
def ascii_ignore(x):
    return x.encode('ascii', 'ignore').decode('acsii')
ascii_udf = udf(ascii_ignore)
mapping_node1694802690218 = mapping_node1694802690218.withColumn("UPC",ascii_udf(col("UPC")))

**Getting error as: **
AttributeError: 'DynamicFrame' object has no attribute 'withColumn'

Joe · Answer

I have figured out the solution. "withColumn' is not a part of DynamicFrame.
I had to convert the Dynamic Frame into Data Frame and then use 'withColumn' attribute to implement the regex function like below:
from pyspark.sql.types import *
from pyspark.sql.functions import regexp_replace
from awsglue.dynamicframe import DynamicFrame
data_frames = full_order_node.toDF()   ##converting to DataFrame
data_frames = data_frames.withColumn("featured",regexp_replace(col("featured")," ", ""))
final_output = DynamicFrame.fromDF(data_frames, glueContext, "final_output")  ##converting back to DynamicFrame

Remove Non-ASCII characters from S3 file using Glue

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