题意：
用python做一个名为野鹅逃亡（wild goose chase）的命令行游戏，野鹅必须吓跑地图上所有生物或者逃到安全位置才能获得胜利，被其他生物抓住游戏失败。
解析：
游戏主要涉及4个类，Loaction、Item、Creatures、Goosechasers;Location描述玩家当前位置及周围9个结点的信息；Items描述每个装备的名字、介绍及威胁性信息；Creations描述所有生物名字、威胁性信息；Goosechasers描述天敌行为信息。游戏交互命令：QUIT,退出游戏；HELP，打印提示信息；INV,打印玩家当前装备信息；TAKE
游戏进程：
涉及知识点：
python、数组、类和对象、信息处理
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INFO1110 / COMP9001 Assignment 2
Goosechasers: A Titled Goose Game
Milestone Deadline: 11:59 PM Monday, 28th October 2019 AEST (Week 12)
Final Deadline: 11:59 PM Monday, 4th November 2019 AEST (Week 13)
Weighting: 10% of the final assessment mark.
You are a goose. Beautiful. Majestic. Unstoppable. In the wake of your majesty, even the most
intense of human passions are but fleeting whispers in comparison - for not only are you a
goose, you are the Goose: Her Excellency, Duchess Hilda von Goosensmirch the Red, Countess of
Loch Lanore and Grandmaster of the Order of the Silver Leek. There are those, however, that
claim to see you for what you truly are: a terror to society; an agent of chaos - an avatar of
destruction.
The Goosechasers, as they call themselves, belong to a nefarious order of humans (and humanadjacent creatures) dedicated to your capture and suppression. Thanks to an unfortunate series
of events, you, Duchess Hilda von Goosensmirch the Red, Countess of Loch Lanore and
Grandmaster of the Order of the Silver Leek, have been cornered by one or more of these
Goosechasers - a scenario most sub-optimal for you and yours.
You are, of course, a goose, and in all your wisdom and majesty, are privy to many a means of
response to this situation. Perhaps you are feeling merciful, and simply wish to evade the
Goosechasers until they are no longer a problem - or perhaps you have suffered their existence
long enough, and must remind them that they have no right to encroach upon your domain.
Picture Credits: Pixabay, Uploaded by Alexas_Fotos on June 20th, 2018.
Overview
Description
For this assignment, you will write a game that simulates a wild goose chase. The player will
control a goose - a creature - that moves from one location to another, while avoiding other
creatures that wish to harm it. The goose may attempt to frighten other creatures into running
away (permanently) by honking at them, though some creatures will be more difficult to frighten
than others. If the goose is caught by another creature that it cannot frighten, the player loses. If
the goose successfully navigates to a location that allows it to flee from the other creatures, or
successfully frightens away all other creatures on the map, the player wins.
Implementation details
Your program will be written in Python 3. The only Python module that you are allowed to import
is sys . To help you begin, a scaffold has been provided. This scaffold consists of the following
files:
game.py , which should contain the main body of your program.
preprocessing.py
creature.py
location.py
item.py
creature_test.py (only relevant to final submission; see page 29 for details)
Your entire program must be contained in these files. It is recommended that you implement the
functions in these files to the best of your ability, and use them to help you complete the
assignment. You may create new functions as you see fit.
Additionally, a few sample configuration files have been given to help you start up your program.
Help and feedback
You are encouraged to ask questions about the assignment on the discussion board, on Ed.
Please ensure your code is comprehensible before requesting feedback. We recommend that
your code adheres to the PEP 8 style guide, and is commented appropriately.
Staff may make announcements on Ed regarding any updates or clarifications to the assignment.
You can ask questions on Ed using the assignments category. Please read this assignment
description carefully before asking questions. Please ensure that your work is your own and you
do not share any code or solutions with other students.
Submission
You will submit your code on two separate assignment pages on Edstem - one for your Milestone
submission and one for your Final submission. You are encouraged to submit multiple times. After
each submission, the marking system will automatically check your code against public test
cases.
These public tests do not cover all parts of the specification and your code. The complete test
suite contains both public and hidden test cases, and your code will not be run through this suite
until after the assignment deadline.
Please ensure you carefully follow the assignment specification. Your program output must
exactly match the output shown in the examples.
Warning: Any attempts to deceive or disrupt the marking system will result in an immediate zero
for the entire assignment. Negative marks can be assigned if you do not properly follow the
assignment specifications, or your code is unnecessarily or deliberately obfuscated.
Milestone
To ensure you are making regular progress on this assignment, you must have achieved a
minimum level of functionality in your submission by October 28th, 11:59 PM AEST (Week 12
Monday) to receive a portion of the marks. See the Milestone Submission section at the end of this
document for further details.
Configuration Files
The program will be given 4 extra command line arguments when it is run:
These arguments (let's call them configuration files) will be used to generate Location , Item ,
and Creature objects that you will need to run your program. The Location , Item , and Creature
classes are to be defined in the location.py , item.py , and creature.py files, respectively, and
the specification for these are available in the Classes section on page 6 onwards.
Examples of these configuration files are available in the provided scaffold; check for the files
sample_paths.txt , sample_items.txt , sample_chasers.txt , and sample_exits.txt Empty lines
encountered in any configuration file can be safely skipped and ignored.
If fewer than 4 arguments are supplied, print: "Usage: python3 game.py
" and exit the program.
Of the given arguments, you can expect that they will all be paths to a file (and/or the name of a
file). If any one of the files specified by the arguments do not exist, print: "You have
specified an invalid configuration file." and exit the program.
The first argument, , should be the name of a file containing a list of all connections
between Locations in the program. You can use this file to generate Location objects as defined
on page 6. Each line is of the form:
Where START and DIRECTION are the names of Location objects, and DIRECTION indicates a
direction on the compass (northwest, north, northeast, east, southeast, south, southwest, west)
that a creature must travel towards in order to move between START and DIRECTION . For
example:
If a Creature is currently at the Lake , it can move NORTHEAST to arrive at the Trail . Similarly, if a
Creature is currently on the Trail , it can travel SOUTH in order to arrive at the Gazebo .
$ python3 game.py
START > DIRECTION > DESTINATION
Lake > northeast > Trail
Trail > SOUTH > Gazebo
Paths do not need to be reflective - going north in location A and immediately going back south
does not have to lead you back to location A. This is a game, so some paths might not make
sense, and that's ok! For example:
Location names are case sensitive, but DIRECTION s are not.
When the program starts, the player will begin in the FIRST room specified by this file. If an
empty file is given, print: "The game cannot run without any rooms :(" and exit the
program.
You can reasonably expect that any file we will give you will contain valid input (i.e. no
weird lines like "Grass > Fence > More Grass" or "Not enough > arrows" .)
The second argument, , should be the name of a file defining all the Item objects that
are available in-game. Each line is of the form:
Most of these are explained in the description of the Item class on page 9.
full_desc is a long description of the item which is written to a Location 's description if the
item exists at that location, but has not been picked up by a Creature . More information on
this in can be found in the Location description on page 6.
location - as it implies - specifies the name of a Location that the Item object will appear
in when the game begins. You can expect that this is name will also appear somewhere in
the configuration file.
For example:
It is possible for the game to start and end with no items, so it is possible that the file specified by
is empty. Should this be the case, the game should run as normal.
Lake > NORTH > Gazebo
Gazebo > South > Gazebo
short_name | item_name | full_desc | terror_rating | location
rake | battered, old rake | A battered, old rake lies here, dreaming of lakes. | 2 |
Garden
The third argument, , should be the name of a file defining all Creature objects in the
game that are not controlled by the player. Each line of this file is of the form:
The name of a Creature is a unique name that the program (and the user) can use to refer
to the Creature object.
A description of the Creature will be written to a Location 's description if the Creature is
in the same Location as the player.
terror_rating describes the terror_rating that a Creature begins with at the start of the
game. This number represents how terrifying something is - or how difficult a Creature is to
frighten. More details about this can be found in the Creature description on page 10.
location - as it implies - specifies the name of a Location that the Creature object will
appear in when the game begins. You can expect that this is name will also appear
somewhere in the configuration file.
direction describes a movement pattern that a Creature will engage in if it is not
controlled by the player. More on this on pages 10-12.
An example:
As the premise of the game is not possible without any creatures to chase the player, the
file cannot be empty! If an empty file is provided, print: "There is
nothing chasing you!" and exit the program.
The fourth argument, , should be the name of a file that contains a list of Location
names. Each of these Location objects will allow the player to use the FLEE command (page 16)
to win the game. If a line specifies a name that does not correspond to a Location , ignore it and
move on to the next one.
It is possible for the configuration file to be empty - in that case, the player has no
choice but to scare off all other Creatures to win!
name | description | terror_rating | location | direction
dog | A dog is barking at you! | 4 | Park | North
Classes
Locations
Each location in the game is represented by an object of the Location class, which you can define
in the given location.py scaffold. A Location object is characterised by:
A name attribute - this is unique to each Location ; no two Location objects should have the
same name !
The ability to store Item objects. When the game begins, a Location may already contain
one or more Item objects (as dictated by the configuration file.)
The player may also choose to DROP an object at their current location.
For each Location loc , you will also want to:
Store all other locations that a Creature can reach by moving in a compass direction away
from loc . (These are defined by the configuration file, written on page 3.)
Know whether or not using the FLEE command when the player is at Location loc will end
the game. (These are defined by the configuration file, written on page 5.)
At the start of the game, and whenever the player enters a new Location or whenever the
LOOK command is invoked, a display representing their current Location is printed to standard
output. Such a display consists of:
A visualisation of the room and its possible exits. This visualisation is always 5 lines long,
and is populated by boxes [ ] to indicate locations reachable from the player's position.
There are nine possible boxes total: one for each point of the compass, and one for the
player's current location. The rstrip() method may be useful here.
The current location, [x] , is always in the middle of the third line (about four
spaces/character widths from the left edge).
[x]
You are now at: A Room With No Paths.
There is nothing here.
>>
If it is possible for the player to reach another Location by moving northwest of their
current position, another box [ ] will appear on the top left corner of the display, with a
line leading to it from the current location [x] - like so:
Likewise, if it is possible for the player to reach another Location by moving north of their
current position, another box will appear in the middle of the top row of the display - also
with a line leading from the current location.
Similarly for the northeast/top right corner:
... and so on for all the points of the compass. Be aware that a Location can have
multiple paths!
[ ]
\
[x]
You are now at: A Room With One Path.
There is nothing here.
>>
[ ]
|
[x]
You are now at: A Different Room.
There is nothing here.
>>
[ ]
/
[x]
You are now at: New Room.
There is nothing here.
>>
[ ]
|
[x]-[ ]
/
[ ]
You are now at: A Room With Three Paths.
There is nothing here.
>>
So a room with all possible paths leading out will look as follows:
Additionally, adjacent Locations that have one or more non-player Creature s inside of them
will be represented with [C] instead.
A line indicating the name of the player's current location. It follows the form: "You are now
at: ."
A paragraph of variable length, derived from the full_desc attributes of all Item objects in
the current Location , followed by the description attributes of all Creature objects in the
current Location that are not controlled by the player (such Creatures will be described in
more detail on page 10.)
[ ] [ ]
\ /
[ ]-[x]
|
[ ]
You are now at: A Room With Many Paths.
There is nothing here.
>>
[ ] [ ] [ ]
\ | /
[ ]-[x]-[ ]
/ | \
[ ] [ ] [ ]
You are now at: A Crossroads.
There is nothing here.
>>
[C] [C] [ ]
\ | /
[ ]-[x]-[ ]
/ | \
[C] [ ] [C]
You are now at: A Crossroads.
There is nothing here.
>>
[ ]-[x]
|
[ ]
You are now at: The Den.
There is an abandoned hot dog here. Goosechaser Alice is trying to slow you down by
scattering breadcrumbs at your feet.
>>
If there are multiple Item objects at a Location , the full_desc of the first item to be
present in the Location will be printed first.
e.g. If the Garden contains a knife, then the player drops a donut in the Garden , the
full_desc of the knife will be printed first, then the donut.
If there is no way to tell which Item arrived at the location first (i.e. they both
started in the same room), this priority instead goes to the first Item to be defined
in the configuration file.
If two or more Creature s not controlled by the player are in the same Location when
this happens, the first Creature to appear in the configuration file will have
its description printed first.
If no Items or non-player Creatures are at the player's current Location , this line will
instead say, "There is nothing here."
If it is possible for the player to successfully use the FLEE command at a location (this is a
win condition! Check the FLEE command on page 16 for more details), the following line is
added to the end of the display: "The path to freedom is clear. You can FLEE this place."
Items
Every item in the game is represented by an object of the Item class, which you can define in the
given item.py scaffold. An Item object has the following attributes:
A short_name is an abbreviation of the item's full name, which the user can use to refer to
the item when entering commands. To avoid confusion, short_name s are unique and caseinsensitive.
item_name is the item's name in full, usually a short description of what it is. item_name s are
also unique and case-insensitive.
full_desc is a long description of the item which is written to a Location 's description if the
Item exists at that location but has not been picked up by a Creature .
terror_rating describes how much more terrifying a Creature will look if it is carrying an
item. This should be a number, and can be negative or positive. Whenever a creature picks
up an item, the item's terror_rating is immediately added to the creature's. Whenever a
creature drops an item, the item's terror_rating is immediately subtracted from the
creature's.
[ ]-[x]
|
[ ]
You are now at: The Den.
There is an abandoned hot dog here. Goosechaser Alice is trying to slow you down by
scattering breadcrumbs at your feet.
The path to freedom is clear. You can FLEE this place.
>>
Creatures
An object of the Creature class represents an entity in your game - you can define this class in
the given creature.py scaffold. It could represent the goose that the player is trying to lead to
safety, or any number of Goosechasers that are attempting to corner it. All non-player Creature
objects should be defined in the configuration file (page 5). Creatures are
characterised by the following properties:
A name - a unique and case-insensitive name that the program (and the user) can use to
refer to the Creature object.
A terror_rating . This number represents how terrifying something is - or how difficult a
Creature is to frighten.
At the start of the game, the player's (goose's) terror_rating is 5.
Every other Creature object's initial terror_rating is defined by the file.
ALL Creatures , including those not controlled by the player, can obtain and carry Item
objects that can modify its terror_rating .
Some way of keeping track of the Item objects being carried by the Creature .
Some way of keeping track of where the creature is - possibly by tying it to a Location . Be
aware that all Creature objects should be able to move from one Location to another - and
that more than one Creature can exist at the same Location at a time.
Goosechasers (Non-Player Creatures)
On top of the above, non-player Creatures (let's call them Goosechasers) might have a
description - a short description of this entity that is written to a Location 's display when the
player is in the same room as the Creature .
Goosechasers are also special because of how they move and interact with the rest of the game!
Each Goosechaser has a direction property that tells them what direction they'll attempt to
move in if they have to move. This property is defined for each Goosechaser in the
configuration file.
Every time the player moves to a new location, uses the WAIT or HONK commands, drops an
item, or picks up an item, all Goosechasers in the game will "take their turn" - starting with the
Goosechaser that appears first in the configuration file, then the one that appears
second, and so on. The player's (goose's) action - moving, waiting, or interacting with items - will
always resolve before any Goosechasers can take their turn. A diagram has been provided on the
next page to better illustrate how Goosechasers react to specific commands.
Player's "Turn"
Player enters commands.