input: Write a function to create a Python class named `Person` with given attributes `name` (string), `age` (integer), and `email` (string). The class should have a method `toString()` that returns a formatted string displaying all the attributes. 
  
  class Person:
      
      def __init__(self, name, age, email):
          self.name = name
          self.age = age
          self.email = email
      
      def toString(self):
          return f"Name: {self.name}, Age: {self.age}, Email: {self.email}"
  
  assert Person('Alice', 30, 'alice@example.com').toString() == "Name: Alice, Age: 30, Email: alice@example.com"
  assert Person('Bob', 25, 'bob@example.com').toString() == "Name: Bob, Age: 25, Email: bob@example.com"
  assert Person('Charlie', 40, 'charlie@example.com').toString() == "Name: Charlie, Age: 40, Email: charlie@example.com"
  assert Person('Diana', 22, 'diana@example.com').toString() == "Name: Diana, Age: 22, Email: diana@example.com"
output: class Person:
      
      def __init__(self, name, age, email):
          self.name = name
          self.age = age
          self.email = email
      
      def toString(self):
          return f"Name: {self.name}, Age: {self.age}, Email: {self.email}"