human
Solve the following python programming problem given the following code:
def _existing_partitions(self, table, database, client) : 
    def _parse_partition_string(partition_string) : 
        partition_def = { 
            
} 
        for part in partition_string.split ('/') : 
            (name, value) = part.split ('=') 
            partition_def [name] = value 
return partition_def 
partition_strings = client.get_partition_names (_parse_partition_string, table, (- 1)) 
    return [_parse_partition_string (existing_partition) for existing_partition in partition_strings] 

    
    

    Fix the buggy line: partition_strings = client.get_partition_names (_parse_partition_string, table, (- 1))
assistant
#Here is Python code to fix the buggy line: partition_strings = client.

partition_strings = client.get_partition_names (database, table, (- 1))