I am completing a text based game for an intro to python class. It is not complete but I was working on the main_menu function and the functions called within the main_menu function when I ran into this error message. I have encountered this error several times in my learning experience and it was usually attributed to a basic mistake when assigning variables, but this one has me stumped... This is the script in question (lines in traceback commented in BOLD):
import random
from sys import exit
# Item variables
coal = ('Coal', 'some coal which can be used in a furnace.')
eng_key = ('Key', 'a key to a house.')
bomb = ('Bomb', 'a combustible device which creates a powerfull explosion. Possibly used for demolition...')
tonic = ('Tonic', 'a weak healing tonic. Adds \'5\' health points.')
sTonic = ('Super Tonic', 'a strong healing tonic. Adds \'10\' health points.')
# LOCATIONS
# Below are the possible locations you can 'travel' to, along with a title (first item in tuple), a description, any items that might be found in the location which can be discovered and entered into 'inventory' through 'search' command
# location variable = (title, description, item for discovery)
sub_base = ('Sub-Base', 'This is DeepBlue\'s base of operations in the Atlantis excavation zone. Your submarine is docked ahead', 'nothing useful here.')
cave = ('Underwater Cave', 'You have entered the mouth of an underwater cave with your sub.', 'nothing useful here.')
cemetery = ('Cemetery Chamber', 'You are in a large chamber within the cave. This seems to be a cemetery. There are symmetrically lined mounds of dirt, with obelisks at the head.', 'nothing useful here.')
city_gate = ('City Gate', 'You stand at a crossroad of sorts, at the bottom of an upward sloping ramp.', 'nothing useful here.')
city_outskirts = ('City Outskirts', 'You find yourself just outside the city walls.', 'nothing useful here.')
castle_outskirts = ('Rear of Castle Ruins', 'You are standing at the rear of the castle ruins. There is a layer of rubble blocking the way, but you can clearly see a passage leading inside. Perhaps you can devise a way to move it...', 'nothing useful here.')
castle_inside = ('Inside the Grand Castle of Atlantis', 'You have made it inside of the castle. All the advanced knowledge of the Atlanteans is at your disposal.', 'nothing useful here.')
city_block0 = ('Beginning of Main Avenue in City', 'You are standing at the beginning of the main avenue of the city.', 'nothing useful here.')
ruins1 = ('Rubble of Dilapidated House', 'You are standing in the middle of the ruins of what seems to have been a house.', tonic)
mystic_house = ('Mystic House', 'You are standing inside the city Mystic\'s house.', sTonic)
city_block1 = ('Second Block in City', 'You have moved to the second block of the city\'s main avenue.', 'nothing useful here.')
abandoned_house = ('Abandoned House', 'You are standing in the middle of an abandoned house.', eng_key)
blacksmith_house = ('Blacksmith\'s House', 'You are standing in what seems to be a blacksmith\'s building. There is a furnace, iron ore, smith\'s tools and various components for making swords. No coal though...', 'nothing useful here. But with the right items, something can be created here...')
city_block2 = ('Third Block in City', 'You have moved to the third block of the city\'s main avenue.', 'nothing useful here.')
marketplace = ('Abandoned Marketplace', 'You are standing in the middle of an abandoned marketplace. There might be some useful items laying around...', coal)
engineer_house = ('Engineer\'s House', 'You are standing in the engineer\'s house. There might be some useful items lying around...', bomb)
castle_main = ('Castle Main Entrance', 'You are standing in front of the main entrance of a huge castle. The grand entrance is blocked off by massive amounts of rubble. There must be another way in...', 'nothing useful here.')
# ITEMS
# below are the items which may be added to the inventory
items = {
coal: (engineer_house,),
eng_key: (engineer_house,),
bomb: (castle_inside,),
tonic: ('anywhere',),
sTonic: ('anywhere',)
}
# INTERACTIONS(location-based)
# below is a dictionary of events. Each location has certain events which can only take place there.
# interactions dictionary = {location: (use+item response, search response)}
lEvents = {sub_base: (cave,),
cave: (sub_base, cemetery, city_gate),
cemetery: (cave, city_outskirts),
city_gate: (cave, city_outskirts, city_block0),
city_outskirts: (cemetery, castle_outskirts, city_gate),
castle_outskirts: (city_outskirts,castle_inside),
castle_inside: (castle_outskirts,),
city_block0: (city_gate, ruins1, mystic_house, city_block1),
ruins1: (city_block0,),
mystic_house: (city_block0,),
city_block1: (city_block0, abandoned_house, blacksmith_house, city_block2),
abandoned_house: (city_block1,),
blacksmith_house: (city_block1,),
city_block2: (city_block1, marketplace, engineer_house, castle_main),
marketplace: (city_block2,),
engineer_house: (city_block2,),
castle_main: (city_block2,)
}
# TRAVEL OPTIONS
# Below is a dictionary outlining the possible places to travel to depending on where you are currently located, this peice is essential to the travel function
travelOpt = {
sub_base: (cave,),
cave: (sub_base, cemetery, city_gate),
cemetery: (cave, city_outskirts),
city_gate: (cave, city_outskirts, city_block0),
city_outskirts: (cemetery, castle_outskirts, city_gate),
castle_outskirts: (city_outskirts,castle_inside),
castle_inside: (castle_outskirts,),
city_block0: (city_gate, ruins1, mystic_house, city_block1),
ruins1: (city_block0,),
mystic_house: (city_block0,),
city_block1: (city_block0, abandoned_house, blacksmith_house, city_block2),
abandoned_house: (city_block1,),
blacksmith_house: (city_block1,),
city_block2: (city_block1, marketplace, engineer_house, castle_main),
marketplace: (city_block2,),
engineer_house: (city_block2,),
castle_main: (city_block2,)
}
def eHouseAccess(action, location, eHouse):
if eHouse == 'locked':
print "The door is locked! You need to find a key for this door."
travel(location)
else:
location = travelOpt[location][action - 1]
travel(location)
def cInsideAccess(action, location, cInside):
if cInside == 'blocked':
print "The path is blocked by rubble! You need to find a way to clear the rubble."
travel(location)
else:
location = travelOpt[location][action - 1]
travel(location)
def travel(location):
while True:
print "You are in the", location[0]+"."
print location[1]
print 'You can travel to:'
for (i, t) in enumerate(travelOpt[location]):
print i + 1, t[0]
action = raw_input("Pick a destination, or enter 'menu' for the main menu: ")
if action == 'menu':
main_menu(location, inventory, items)
else:
action = int(action)
if travelOpt[location][action - 1] == engineer_house:
eHouseAccess(action, location, eHouse)
elif travelOpt[location][action - 1] == castle_inside:
cInsideAccess(action, location, cInside)
else:
location = travelOpt[location][action - 1]
def main_menu(location, inventory, items):
travel = travel(location) # **this is line 133**
invtry = showInv(inventory)
use = use(items, inventory)
quit = exit(0)
while True:
print "You are in the", location[0]
menu_list = [('Travel', travel), ('Inventory', invtry), ('Use', use), ('Search', search), ('Map', map), ('Quit', quit)]
print "Choose one:"
for (num, t) in enumerate(menu_list):
print num + 1, t[0]
main_choice = int(raw_input("> "))
action = menu_list[main_choice - 1]
action[1]
def search(location):
pass
def map(location):
pass
def showInv(inventory):
if inventory == []:
print "Your inventory is empty"
inv = 'empty'
return inv
else:
for (num, i) in enumerate(inventory):
print num + 1, i
inv = inventory
return inv
def use(items, inventory):
a = showInv(inventory)
if a == 'empty':
print "There is nothing to use."
else:
showInv(inventory)
uItem = int(raw_input("Choose an item to use: "))
location = sub_base
inventory = []
eHouse = 'locked'
cInside = 'blocked'
hp = 20
map = """
Key:
* = indicates a point of entry
______ ______
|Castle|Castle|
|Outsk-| |
|irts |
___|**____|__**__|
| City | | |
|Outsk-| | City |
| irts | | |
_____|*____*|___|*_____|
| | | |
| Grave | | City |
| Yard | | Gates |
|_____**|__|*______|
| |
| Cave |
| |
|__**___|
| |
| Sub- |
| Base |
|_______|
"""
cityMap = """
Key:
* = indicates a point of entry
________
| |
| Castle |
| |
______|___**___|________
| | City | Engin- |
|Market| Block | eer |
|Place * 3 * House |
|______|___ ___|________|
|Aband-| City | Black- |
| oned | Block | smith |
|House * 2 * House |
|______|___**___|________|
| | City | |
|Rubble| Block |Mystic's|
| * 1 * House |
|______|________|________|
"""
name = raw_input("Enter your name: ")
print "Welcome to the Atlantis Excavation Zone, %s." % name
print "Your first day on the job and we already have a new cave for you to map... LUCKY!"
print "The DeepBlue team takes you down to the sub base. Time to get to work."
main_menu(location, inventory, items) # **this is line 236**
And here is the traceback:
Traceback (most recent call last):
File "ex36_2.py", line 236, in <module>
main_menu(location, inventory, items)
File "ex36_2.py", line 133, in main_menu
travel = travel(location)
UnboundLocalError: local variable 'travel' referenced before assignment
I thought the variable had been assigned in line 133. What am I missing here?
