Hi, I have a class Record and a list key_attrs that specifies the names of all attributes that correspond to a primary key.
I can write a function like this to get the primary key: def get_key(instance_of_record): return tuple(instance_of_record.__dict__[k] for k in key_attrs) However, since key_attrs are determined at the beginning of the program while get_key() will be called over and over again, I am wondering if there is a way to dynamically generate a get_ley method with the key attributes expanded to avoid the list comprehension/ generator. For example, if key_attrs=['A','B'], I want the generated function to be equivalent to the following: def get_key(instance_of_record): return (instance_of_record['A'],instance_of_record['B'] ) I realize I can use eval or exec to do this. But is there any other way to do this? Thanks, gz -- http://mail.python.org/mailman/listinfo/python-list
