Map/Iterating through List of Python Object

Question

Is there a way to iterate and call a function on a list of user-defined Python objects with multiple attributes? Let's suppose it's called Entry, with attribute name, and age.

Such that I can say something to the effect of

def func(name, age):
    //do something

def start(list_of_entries)
    map(func, list_of_entries.name(), list_of_entries.age()) 
    //but obviously the .name and .age of the object, not the iterable
    //these are the only two attributes of the class

Was thinking about using functools.partial() but not sure if that is even valid in this case.

Answer 1

I suppose you could use a lambda function:

>>> def start(list_of_entries):
...     map((lambda x:func(x.name,x.age)), list_of_entries)

But why not just use a loop?:

>>> def start(list_of_entries):
...     for x in list_of_entries: func(x.name, x.age)

or if you need the results of func:

>>> def start(list_of_entries):
...     return [func(x.name, x.age) for x in list_of_entries]

Answer 2

You could use operator.attrgetter() that allows to specify several attributes but explicit list comprehension is better:

results = [f(e.name, e.age) for e in entries]

Answer 3

If name and age are the only two attribs you can use vars. Otherwise, add **kwargs to your func and ignore the rest.

def func(name, age, **kwargs):
    //do something with name and age


def start(list_of_entry):
    map(lambda e: func(**vars(e)), list_of_entry)