Does Python have any syntax that allows you to create an instance of a class and set property values on it within the same statement
You can do this in C# like this
StudentName student2 = new StudentName
{
FirstName = "Craig",
LastName = "Playstead",
};
Is there an equivalent in Python?
Not really. The Pythonic ways to express this might be one of the following.
class StudentName:
def __init__(self, first_name, last_name):
self.first_name = first_name
self.last_name = last_name
student2 = StudentName(first_name="Craig", last_name="Playstead")
(You can also add a , *, argument after self to force users to spell out the keyword names see Keyword (Named) Arguments in Python.)
import collections
StudentName = collections.namedtuple("StudentName", "first_name last_name")
student2 = StudentName(first_name="Craig", last_name="Playstead")
Namedtuples also act like tuples, so you can use student2[0] to access first_name and [1] for last_name.
dataclass (Python 3.7+)import dataclasses
@dataclasses.dataclass
class StudentName:
first_name: str
last_name: str
student2 = StudentName(first_name="Craig", last_name="Playstead")
class StudentName:
def __init__(self, firstname, lastname):
self.firstname = firstname
self.lastname = lastname
name = StudentName('firstname', 'lastname')
If you want to specifically set which property is which in the constructor:
class StudentName:
def __init__(self, firstname='', lastname=''):
self.firstname = firstname
self.lastname = lastname
name = StudentName(firstname='firstname', lastname='lastname')
You can then also create a StudentName like so: StudentName(). His first and lastname would be ''.
You can define defaults in __init__ method which is constructor equivalent
class Student():
def __init__(self, firstname, lastname):
self.firstname = firstname
self.lastname = lastname
def __str__(self):
return "My name is {} {}".format(self.firstname, self.lastname)
s1 = Student("John", "Smith")
print(s1)
__init__method which is constructor equivalent_slots_stackoverflow.com/a/28059785/1344855__slots__is an advanced feature that's very rarely needed in real life. I'm not sure how it would apply here much, anyway.