input: Write a function to create a Python class named Person with the given attributes: name (string), age (integer), and email (string). The class should also include a toString() function that returns a string formatted with the attributes.
  assert Person("John Doe", 30, "john.doe@example.com").toString() == "Name: John Doe, Age: 30, Email: john.doe@example.com"
  assert Person("Jane Smith", 25, "jane.smith@example.com").toString() == "Name: Jane Smith, Age: 25, Email: jane.smith@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}"