Python

More about decorators

class StoreResults:
  def __init__(self, function): # <-- accepts function as an argument
    self.function = function
    self.results = [] # <-- list to store result of the function call

  def __call__(self, *args, **kwargs): # <-- accepts function arguments
    res = self.function(*args) # <-- calls function
    self.results.append(res) # <-- stores result in self.results before returning
    return res

@StoreResults
def add(a, b):
  '''Adds two numbers'''
  return a + b

# Do a couple of calculations
print(add(3, 4))
print(add(2, 3))
print(add(4, 6))

print(add.results) # <-- access the stored results
print(add) # <-- add is now an object of StoreResults