import base64
import polars as pl

def main(base_str):
    base64_string = base_str
    sample_string_bytes = base64.b64decode(base64_string) 
    #return sample_string_bytes.decode()
    return pl.read_csv(sample_string_bytes)

import base64
import polars as pl

def main(base_str):
    base64_string = base_str
    sample_string_bytes = base64.b64decode(base64_string) 
    #return sample_string_bytes.decode()
    return pl.read_csv(sample_string_bytes)