python map,filter,each

python map,filter,each

def _each(list, iter):
    for i in range(len(list)):
        iter(list[i], i)


def _map(list, iter):
    new_list = []
    _each(list, lambda v, i: new_list.append(iter(v)))
    return new_list


def _filter(list, iter):
    new_list = []
    _each(list, lambda v, i:
          iter(v) and
          new_list.append(v))
    return new_list


class User:
    def __init__(self, id, name, age):
        self.id = id
        self.name = name
        self.age = age

    def __str__(self):
        return str(self.id) + str(self.name)+ str(self.age)


users = [
    User(1, 'ID', 32),
    User(2, 'HA', 25),
    User(3, 'BJ', 67),
    User(4, 'PJ', 12),
    User(5, 'JE', 44),
    User(6, 'JM', 23)
]