tests/data/cases/pattern_matching_simple.py

   1 # flags: --minimum-version=3.10
   2 # Cases sampled from PEP 636 examples
   3
   4 match command.split():
   5     case [action, obj]:
   6         ...  # interpret action, obj
   7
   8 match command.split():
   9     case [action]:
  10         ...  # interpret single-verb action
  11     case [action, obj]:
  12         ...  # interpret action, obj
  13
  14 match command.split():
  15     case ["quit"]:
  16         print("Goodbye!")
  17         quit_game()
  18     case ["look"]:
  19         current_room.describe()
  20     case ["get", obj]:
  21         character.get(obj, current_room)
  22     case ["go", direction]:
  23         current_room = current_room.neighbor(direction)
  24     # The rest of your commands go here
  25
  26 match command.split():
  27     case ["drop", *objects]:
  28         for obj in objects:
  29             character.drop(obj, current_room)
  30     # The rest of your commands go here
  31
  32 match command.split():
  33     case ["quit"]:
  34         pass
  35     case ["go", direction]:
  36         print("Going:", direction)
  37     case ["drop", *objects]:
  38         print("Dropping: ", *objects)
  39     case _:
  40         print(f"Sorry, I couldn't understand {command!r}")
  41
  42 match command.split():
  43     case ["north"] | ["go", "north"]:
  44         current_room = current_room.neighbor("north")
  45     case ["get", obj] | ["pick", "up", obj] | ["pick", obj, "up"]:
  46         ...  # Code for picking up the given object
  47
  48 match command.split():
  49     case ["go", ("north" | "south" | "east" | "west")]:
  50         current_room = current_room.neighbor(...)
  51         # how do I know which direction to go?
  52
  53 match command.split():
  54     case ["go", ("north" | "south" | "east" | "west") as direction]:
  55         current_room = current_room.neighbor(direction)
  56
  57 match command.split():
  58     case ["go", direction] if direction in current_room.exits:
  59         current_room = current_room.neighbor(direction)
  60     case ["go", _]:
  61         print("Sorry, you can't go that way")
  62
  63 match event.get():
  64     case Click(position=(x, y)):
  65         handle_click_at(x, y)
  66     case KeyPress(key_name="Q") | Quit():
  67         game.quit()
  68     case KeyPress(key_name="up arrow"):
  69         game.go_north()
  70     case KeyPress():
  71         pass  # Ignore other keystrokes
  72     case other_event:
  73         raise ValueError(f"Unrecognized event: {other_event}")
  74
  75 match event.get():
  76     case Click((x, y), button=Button.LEFT):  # This is a left click
  77         handle_click_at(x, y)
  78     case Click():
  79         pass  # ignore other clicks
  80
  81
  82 def where_is(point):
  83     match point:
  84         case Point(x=0, y=0):
  85             print("Origin")
  86         case Point(x=0, y=y):
  87             print(f"Y={y}")
  88         case Point(x=x, y=0):
  89             print(f"X={x}")
  90         case Point():
  91             print("Somewhere else")
  92         case _:
  93             print("Not a point")