Import a CSV file into a DynamoDB table

dynamodb-csv.py

import os
import ast
import sys
import csv

import boto3


AWS_ACCESS_KEY = "<YOUR ACCESS KEY HERE>"
AWS_SECRET_KEY = "<YOUR SECRET KEY HERE>"
AWS_REGION = "<YOUR AWS REGION HERE>"
TABLE_NAME = "<YOUR DYNAMODB TABLE NAME HERE>"
CSV_FILE = "<YOUR CSV FILEPATH HERE>"


# Establish a connection to DynamoDB via Boto 3.
dynamodb = boto3.resource(
    "dynamodb",
    aws_access_key_id=AWS_ACCESS_KEY,
    aws_secret_access_key=AWS_SECRET_KEY,
    region_name=AWS_REGION
)

# Lazy-load the DynamoDB table in question.
table = dynamodb.Table(TABLE_NAME)
coercion_funcs = {
    "(N)": int,
    "(S)": str,
    "(M)": ast.literal_eval  # lol fite me
}


# Load the CSV file into memory.
with open(CSV_FILE) as csv_file:
    reader = csv.reader(csv_file, delimiter=",")

    with table.batch_writer() as batch:
        # The first row of a CSV file is its headings.
        header = next(reader)
        headings = []

        # Tag each heading with an associated "coercion" function.
        # This function restores the original type of the data.
        for header_value in header:
            title, type_ = header_value.split()
            headings.append((title, coercion_funcs[type_]))

        # For each row, coerce the value and add the item to Dynamo.
        for row in reader:
            item = {}
            for val, (heading, func) in zip(row, headings):
                item[heading] = func(val)
            batch.put_item(Item=item)
        

i am getting title, type_ = header_value.split()
ValueError: not enough values to unpack (expected 2, got 1)

how should be my csv looks like ?