class Course:

    def __init__(self, name , duration , link ):
        self.name = name
        self.duration = duration
        self.link = link

    def __repr__(self):
        return f"{self.name} [{self.duration} horas] ({self.link})"

courses = [ 
        Course("Introduccion a Linux",15,"https://hack4u.io/cursos/introduccion-a-linux/"),
        Course("Personalizacion de Linux",3,"https://hack4u.io/cursos/personalizacion-de-entorno-en-linux/"),
        Course("Introduccion al Hacking",53,"https://hack4u.io/cursos/introduccion-al-hacking/")
]

def list_courses():
  for course in courses:
      print(course)


def search_course_by_name(name):
    for course in courses:
        if course.name == name:
            return course

    return None
