Answer:
import csv
import sys
file_csv = argv
with open( "file_csv", "rb" ) as file:
   rowlist= csv.DictReader( file )
   dict_count={ }
   for row in rowlist:
      dict_count[ row[ 'department' ] ] = dict_count.get( row[ 'department' ], 0 ) + 1
   print( " The count of employees per department are", dict_count )
Explanation:
The python script in the solution above is able to accept user input csv files via command prompt and get an output of the number of employees for each department.