Why does Python not support record type? (i.e. mutable namedtuple)

Question

Why does Python not support a record type natively? It\'s a matter of having a mutable version of namedtuple.

I could use namedtuple._replace. But I nee

Answer 1

There's a library similar to namedtuple, but mutable, called recordtype.

Package home: http://pypi.python.org/pypi/recordtype

Simple example:

from recordtype import recordtype

Person = recordtype('Person', 'first_name last_name phone_number')
person1 = Person('Trent', 'Steele', '637-3049')
person1.last_name = 'Terrence';

print person1
# Person(first_name=Trent, last_name=Terrence, phone_number=637-3049)

Simple default value example:

Basis = recordtype('Basis', [('x', 1), ('y', 0)])

Iterate through the fields of person1 in order:

map(person1.__getattribute__, Person._fields)