AttributeError: 'list' object has no attribute 'values'

[ilknurg]

I have a query. My query returns the result that i want as a dictionary.

Like:

[{'community_string': 'public'}, {'community_string': 'private'}]

I want to use only public and private as a string. For doing it, i wrote my code like that:

query= "SELECT community_string FROM nat_snmp_string WHERE status ='enable'"
cursor = connection.cursor(dictionary=True)
cursor.execute(query)
com_str = cursor.fetchall()
com_str_string = com_str.values()
cmnyt_str = json.dumps(list(com_str))
print(cmnyt_str)  
cmd_line = cmnyt_str.replace(':','')
cmd_line = cmd_line.replace('"','')
cmd_line = cmd_line.replace(']','')
cmd_line = cmd_line.replace('[','')
  

but it gives me AttributeError: 'list' object has no attribute 'values' error.
How can i solve this issue?
Thank you for your helps.