default arguments python typehint code example

Example 1: python default arguments

def my_function(name, age = 20):
  print(name + " is " + str(age) + " years old"

my_function("Mitro") # Mitro is 20 years old
my_function("Mitro", 26) #Mitro is 26 years old

Example 2: python default arguments

def your_function(arg,kwarg='default'):
    return arg + kwarg

Example 3: specify return type python function

def greeting(name: str) -> str:
  return 'Hello, {}'.format(name)

Example 4: python optional type annotation

from custom_module import SomeClass
from typing import Optional

class SubClass:
    a_reference: Optional[SomeClass] # Provides info that a_reference may be 'None'.

    def __init__(self):
        self.a_reference = None