In C and also PHP if I declare some variables in a file then include it(in PHP in c it's part of the compiled binary). It just works. Why doesn't this work in python.
Here is what I can do in PHP.
file a.php
$a=1;
$b=2;
file b.php
function add(){
global $a,$b;
return $a+$b;
}
File c.php
require('a.php')
require('b.php')
echo add().PHP_EOL;
You get back 3.
But in python if I do something similar it says that the variable is undefined. In data.py I have the following object/class created. It is not part of any function and the indentation here reflects the same level/scope as the file itself.
player=Player()
In textadventure.py I have the following code.
from data import *
from lib import *
in lib.py I have
def check_input(usr_input):
inputs=usr_input.split(' ')
verb=inputs[0]
global player
if len(inputs) >= 2:
obj=inputs[1]
else:
obj=None
if verb in verbs:
if verb == 'move':
player.location.move(obj)
elif verb == 'look':
look(obj)
else:
print('not valid')
def look(obj):
global player
current_room=player.location
if obj is None:
print(current_room.desc)
else:
if obj in current_room.items:
print(current_room.items[obj].desc)
elif obj in current_room.mobs:
print(current_room.mobs[obj].desc)
I then get the following error though.
Traceback (most recent call last):
File "text_adventure.py", line 84, in <module>
main_loop()
File "text_adventure.py", line 81, in main_loop
check_input(usr_input)
File "/home/macarthur/misc_proj/python_projects/text_adventure/lib.py", line 23, in check_input
look(obj)
File "/home/macarthur/misc_proj/python_projects/text_adventure/lib.py", line 48, in look
current_room=player.location
NameError: name 'player' is not defined
So my question is why doesn't this work. Don't tell me I have to import every single file into every single other file to make sure that it's actually part of the global namespace.
data.py
from templates import *
letter=Item()
letter.desc="It's a letter you found in the mailbox."
letter.interact="The letters have faded but you can make out a single sentence 'Those in the dark fear the light.'"
mailbox=Mailbox()
mailbox.desc='It is a mailbox with the flag up and the front closed'
mailbox.action='interact'
mailbox.contains=letter
starter=Room("You are in a room with four exits \033[1m north east south west\033[0m. There is a single mailbox before you.",mailbox,None)
letter.location=starter._id
mailbox.in_room=0
north=Room("You are in a room with a single source of light. A \033[1m flashlight.\033[0m")
west=Room("You are in a wet room. There is a \033[1mfish\033[0m flopping on the ground before you.")
east=Room("You are in an empty room. You can see nothing else")
south=Room("You are in a dark room. There is nothing that can be seen.")
starter.add_moves({'n':north,'e':east,'s':south,'w':west})
west.add_moves({'e':starter})
east.add_moves({'w':starter})
south.add_moves({'n':starter})
player=Player()
inventory=Inventory()
templates.py
class Item:
_id=0
desc=''
interaction=''
location=None
def __init__(self,desc=desc,interact=interaction,location=location):
self.desc=desc
self.interaction=interact
self.location=location
self._id=Item._id
Item._id+=1
def get_item(self,player):
move_location(self,-1)
print("You have grabbed {} and put it into your \033[1minventory".format(self.desc))
def move_location(self,location):
self.location=location
class Weapon(Item):
damage=0
desc='It is a weapon'
def __init__(self,damage=damage,desc=desc):
self.damage=damage
self.desc=desc
class World():
rooms={}
def __init__(self):
pass
def add_room(self,room):
self.rooms[(room.x,room.y)]=room
class Mailbox(Item):
contains='letter'
def __init__(self,contains=contains):
Item.__init__(self)
self.contains=contains
class Player:
x=0
y=0
location=None
weapon=None
dead=False
hp=10
def __init__(self):
self.x=0
self.y=0
self.weapon=None
self.dead=False
self.location=None
self.hp=10
def damaged(amount):
self.hp=self.hp-amount
class Inventory(Player):
items={}
def __init__(self,items=items):
self.items=items
def add(self,item):
self.items.append(item)
def show(self):
for item in self.items:
print(item._id.desc)
def use(self,item):
if item in items:
print(item.interaction)
else:
print("You don't have that item")
class Room:
desc="You're in a room"
items=None
mobs=None
x=0
y=0
_id=0
exits={}
def __init__(self,desc=desc,items=items,mobs=mobs,x=x,y=y,exits=exits):
self.exits=exits
self.desc=desc
self.items=items
self.mobs=mobs
self.x=x
self.y=y
self._id=Room._id
Room._id+=1
def add_moves(self,moves=exits):
self.exits.update(moves)
def move(self,movement,player):
selected_move=self.exits.get(movement,None)
if selected_move:
player.location=selected_move
else:
return None
class Mob:
_id = 0
desc="You can't discern anything about it."
interact="It just looks at you."
room=None
alive=True
name='None'
hp=5
def __init__(self,desc=desc,interact=interact,alive=alive,name=name,hp=hp):
self.name=name
self.desc=desc
self.interact=interact
self._id=Mob.id
Mob._id+=1
self.alive=alive
self.hp=hp
class Grue(Mob):
def __init__(self):
super().__init__(desc='A giant grue stands before you',interact='You were eaten by a grue',name='Grue',hp=10)
