Lab 3.04 - Aliasing & Scope

Aliasing

• Will updating b affect a?

        a = [1, 2, 4]
        b = a
  

  
  

• What will the list print out after this code is run?

     # input: a list of ints
     # output: an int
     def update_list(a_list): 
         if len(a_list) > 5: 
             a_list[3] = "yo"
             b = a_list[4]
             c = a 
         return c
     my_list = [1, 2, 3, 4, 5]
     update_list(my_list)
  

  
  

Scope

• Draw the stack diagram for the following:

    var_1 = "kittens"
    var_2 = "cookies"
  
    # input: a string
    # output: a string
    def my_function(my_favorite_things): 
        song_lyrics = "rain drops on roses,"
        combined_song = song_lyrics + my_favorite_things
        return combined_song
  
    # input: a string
    # output: a string    
    def my_function_2(item, item2): 
        full_lyrics = item + "on " + item2
        full_song = my_function(full_lyrics)
        return full_song
  
    my_song = my_function_2(var_1, var_2)