list() a function? Or class name?

You are already aware of list() used in python. We use it to create a list either an empty one or from other iterables such as tuple, set, etc.

Consider the following :

list1=list()
t=(1,2,3)
list2=list(t)

My major doubt here is, the name 'list' is a separate function named list or name of the class 'list'?

The reason for my doubt is, the syntax for creating an object is :

obj_name=class_name()

We have created the objects list1 and list2 as given in the syntax

Also

help(list)

Output : 
Help on class list in module builtins:

class list(object)
     .....
     .....
     .....
     __hash__=None

Gives the information only about the class list. Whereas for other built-in functions such as len(), the help() gives the functions' information

help(len)

Output : 
Help on built-in function in module builtins:

len(obj, /)
     Return the number of items in a container.

Hence, Is list() used as class name here to define its object???

Or is there a separate function to create a variable of type 'list' named list()???

To be more specific in my question, in the above code, Does list() acts as a class name or a function name?

If it is a built in function, can l get the code written for it???

Thanks in advance

from list() a function? Or class name?