CS50 DNA Help - How to compare two dictionaries

Question

Can someone explain why my code is returning no match as I thought you can compare two dictionaries with "=="?

 import csv
 import sys
 import copy

 def main():
     # TODO: Check for command-line usage
     if len(sys.argv) != 3:
        sys.exit(1)
     # TODO: Read database file into a variable
     database = []
     key = []
     database_file = sys.argv[1]
     d = open(database_file, "r")
     reader = csv.DictReader(d)
     for name in reader:
         database.append(name)
     copy_database = copy.deepcopy(database)
     for i in range(len(copy_database)):
         del copy_database[i]["name"]
     for i in range(len(copy_database)):
         for k in copy_database[i]:
             key.append(k)
     remove_dup = list(set(key))

     # TODO: Read DNA sequence file into a variable
     sequence_file = sys.argv[2]
     s = open(sequence_file, "r")
     sequence = s.read()
     # TODO: Find longest match of each STR in DNA sequence
     match = {}
     for i in range(len(remove_dup)):
         match[remove_dup[i]] = longest_match(sequence,remove_dup[i])

     # TODO: Check database for matching profiles
     for i in range(len(database)):
         if match == copy_database[i]:
            print(database[i]["name"])
     print("No Match")

I can see that i am putting the longest sequence in the match dict and it is the correct one but when im trying to compare it with the database copy without the name key im not getting any hits.