Error with Bulkloading from CSV to PostGres - psycopg2

Question

import pandas
import pygrametl
import psycopg2
from pygrametl.tables import SlowlyChangingDimension,CachedDimension,BulkDimension
from pygrametl.datasources import CSVSource
##Connection to PostGres
connection = psycopg2.connect(host="localhost",database="postgres", user="postgres",
password="tekihcan")
connect = pygrametl.ConnectionWrapper(connection)
def pgcopybulkloader(name, atts, fieldsep, rowsep, nullval, filehandle):
# Here we use driver-specific code to get fast bulk loading.
# You can change this method if you use another driver or you can
# use the FactTable or BatchFactTable classes (which don't require
# use of driver-specifc code) instead of the BulkFactTable class.
global connection
curs = connect.cursor()
try:
curs.copy_from(file=filehandle, table=name, sep=fieldsep,
columns=atts,null='null')
except(Exception, psycopg2.Database) as error:
print("Error %s" % error)
date_dim = BulkDimension(name='date_dim',key='d_date_sk',attributes=[
'd_date_id (B)'
,'d_date'
,'d_month_seq'
,'d_week_seq'
,'d_quarter_seq'
,'d_year'
,'d_dow'
,'d_moy'
,'d_dom'
,'d_qoy'
,'d_fy_year'
,'d_fy_quarter_seq'
,'d_fy_week_seq'
,'d_day_name'
,'d_quarter_name'
,'d_holiday'
,'d_weekend'
,'d_following_holiday'
,'d_first_dom'
,'d_last_dom'
,'d_same_day_ly'
,'d_same_day_lq'
,'d_current_day'
,'d_current_week'
,'d_current_month'
,'d_current_quarter'
,'d_current_year'
],lookupatts = ['d_date_id (B)'],
bulkloader = pgcopybulkloader)
date_dim_source = CSVSource(open('C:/Users/HP\Documents/v2.13.0rc1/data/date_dim.csv',
'r', 16384),delimiter='|')
def main():
for row in date_dim_source:
date_dim.insert(row)
The code is failing with error -
As per my understanding the error is caused because the target table is empty. The CSV source doesn't have header as well. Could this be impacting the code?
Please find the link that was used to develop the code - https://chrthomsen.github.io/pygrametl/