tests/data/py_310/pattern_matching_simple.py

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