#python help plz
austere crest
fuck python
austere crest
but i sent you a video that explains it
rustic void
fuck python
indeed
frank granite
im watching it
frank granite
hmm I need to go, mom is yelling at me to do shit .-. but im in the middle of trying to solve this
this is only 1 /3 questions
question 2 is scary
using python for OOP
austere crest
do you only have python on your github or smth
austere crest
i mean you can ask to confirm this is the right things. like The document you sent me only references python. Is this correct as I applied for a position referencing Java and C#
not like people never make mistakes
frank granite
also... how do I make classes in python? this seems strange
like interfaces and whatnot
ive never made interface in python before
rustic void
you dont
austere crest
molten bramble
theres no interface in python
austere crest
at this step latest i would ask if python was the right lang
molten bramble
only classes. but you can treat them as abstract classes
frank granite
apparently
from abc import abstractmethod, ABCMeta
so AbstractBase Class is an Interface
frank granite
I hate python
molten bramble
you hate it because you dont understand it :p
molten bramble
it does oop just fine
frank granite
but how if you cant make interfaces
molten bramble
why do you need an interface
frank granite
Q2 needs ones .-..
frank granite
ABC
im triyng to solve Q1 first though
im getting an error that copy is not defined
austere crest
code
frank granite
import copy
# Original object
document = [[1, 2, 3], [4, 5, 6]]
# Shallow copy
copy1 = copy.copy(document)
copy1[1][2] = 15
print("name=Original list= ", document)
print("name=Copy 1 list= ", copy1)
# Another shallow copy
copy2 = copy.copy(document)
copy2[0][2] = 3
print("name=Original list= ", document)
print("name=Copy 2 list= ", copy2)
# Deep copy
copy3 = copy.deepcopy(document)
copy3[1][0] = '456'
copy3[1][1] = 7
copy3[1][2] = 15
copy3[1][3] = 16
print("name=Original list= ", document)
print("name=Copy 3 list= ", copy3)
# Another deep copy
copy4 = copy.deepcopy(document)
copy4[1][0] = '789'
print("name=Original list= ", document)
print("name=Copy 4 list= ", copy4)
i asked AI for this to see what it came up with
molten bramble
whats the error
austere crest
still have no idea why you do a non change on copy2
frank granite
that AI did that, imma change it one sec
oh now I have list assignment out of range on line 23, which is copy3[][] = 16
yep makes sense
austere crest
just so its in here
frank granite
still not sure what to put in the document for the detailed explaination they want
austere crest
explaining why the changes happened as they did
since you only ever edit the copies
frank granite
copy makes a copy of the list, and it effects the original if you change the copy
deepcopy makes a copy of the list as a new object and therefor does not effect the original
thats the wwhole explaination
austere crest
so just explain that detailed
austere crest
[screenshot of copy1 vs original]
since we did X and its a Y the change on ZZZ results in the original also changing
its not bullshiterry
its showing you understand why the output is what it is
frank granite
so 1 and 3 are shallow copies...
austere crest
yes
id just explain the question in the word document show the example output, make up a new original list in your code, make up new changes (all after you know it does what it should), post the code and output as screenshots, then explain the code detailed so this is the original list as we can see its a list of lists being XYZ originally, next screenshot of cop1 vs original this is after we did the first copy being a shallow copy and editing these and those indexes with these and those numbers. as you can see it also changes the subentries of the list as its a shallow copy blablablabla
ofc write it nicely
frank granite
Im guessing "Clone an object call document" is a typo?
frank granite
yeh
austere crest
theres more typos
frank granite
seems the recruiter is indian so that makes sense
austere crest
doesnt explain code typos lol
frank granite
LOL
austere crest
unless its an actually empty entry
frank granite
I wouldnt doubt that
austere crest
but yeah wouldnt matter since the same line has a change that makes it a deep copy
bitter kernel
python.poggers
bitter kernel
ban me, tickets dont get answered 
austere crest
because the question says so
frank granite
oh, I need to modify copy1 before printing it
molten bramble
traling commas are fine
austere crest
oh, I need to modify copy1 before printing it
yes
austere crest
thats not a word document
frank granite
yeh I know but I need to make the code first
austere crest
also id just name them copy1 - copy4 as the question asks
frank granite
maybe I should
molten bramble
if you want to be really cool you can assert yuor expectations :p
frank granite
oh
austere crest
insert image of you t-posing to assert your expectations
frank granite
LOL
need to figure out how to insert a string into a specific index of a loosely typed list .-.
frank granite
nah...I like knowing what type my data is at all times
Having the interpreter intepret it based on assumptions is not nice LOL
well, it works most of the time I guess
molten bramble
everything in python has a type, and its well defined
austere crest
molten bramble
use [0] instead of [1]?
i assume youre rubberducking ebcause you done provide us with a proper question
frank granite
shallowCopy2 = copy.copy(document)
shallowCopy2[1].insert(0, '456')
shallowCopy2[1][1] = 7
shallowCopy2[1][2] = 15
shallowCopy2[1][3] = 16
print("Shallow Copy 2:", shallowCopy2)
print("Original List: ", document, "\n")
that is incomplete
austere crest
looks complete to me
molten bramble
what is document.
what is the output
what output is expected
how did that sticker get there
frank granite
looks complete to me
Well
I still need copy 4 xf
frank granite
Ugh, question 2 now
molten bramble
Nothing for over an hour, so must be going well
frank granite
I am writing the document for q1
And procrastinating slightly cause I'm scared of q3
molten bramble
Did they give an time estimate for the questions?
molten bramble
Well it's good excersice
frank granite
Create a custom class called Value that will hold a number. Then add decorators that allow addition (Add) and subtraction (Sub) to a number (Value). The Add and Sub decorators can accept integers directly, a custom Value object or other Add and Sub decorators. Add, Sub and Value all implement the IValue interface and can be used recursively
what does it mean by "Can be used recursively"?
molten bramble
this is a weird exercice.
frank granite
Yep
molten bramble
sure, a class with a value. sure.
a decorator.. is not an easy thing, but quite interesting technique.
does it say how to use the decorators?
because decorators themselves are applied to functions/classes
frank granite
nope
this is the UML he gave with that descrition
idk how to use Decorators
I got my code to work but Add() and Sub() are not using Decorators AFAIK
molten bramble
decorators are fun. I found them hard to understand at first, but its is fairly simple.
a decorator does something with calling a function. before, after or both
so it can change the input of the function, or alter the output.
or just log for example
i have no idea what they mean with a decorator
chatgpt does something i would not call a decorator hehe
frank granite
this is the code phind gave me when I asked it a bunch of questions about the code I wrote already
from abc import ABC, abstractmethod
class IValue(ABC):
@abstractmethod
def __int__(self):
pass
@abstractmethod
def __add__(self, other):
pass
@abstractmethod
def __sub__(self, other):
pass
def add_decorator(func):
def wrapper(self, other):
result = func(self, other)
return Add(result)
return wrapper
def sub_decorator(func):
def wrapper(self, other):
result = func(self, other)
return Sub(result)
return wrapper
class Value(IValue):
def __init__(self, value):
self.value = value
def __int__(self):
return self.value
@add_decorator
def __add__(self, other):
return self.value + other.value
@sub_decorator
def __sub__(self, other):
return self.value - other.value
class Add(IValue):
def __init__(self, value):
self.value = value
def __int__(self):
return self.value
def __add__(self, other):
return Add(self.value + other.value)
def __sub__(self, other):
return Sub(self.value - other.value)
class Sub(IValue):
def __init__(self, value):
self.value = value
def __int__(self):
return self.value
def __add__(self, other):
return Add(self.value + other.value)
def __sub__(self, other):
return Sub(self.value - other.value)
value1 = Value(int(input("Please give the largest number: ")))
value2 = Value(int(input("Please give the smallest number: ")))
print("\nAddition: ", int(value1 + value2))
print("Subtraction: ", int(value1 - value2))
print("Adding 50 to first number then subtracting the second: ", int((value1 + 50) - value2))
I asked it to make sure these are Decorators in my code
said it was!
idk if these are implemented right but it functions....
wait....
molten bramble
te add_decorator and sub are decorators
frank granite
the UML wants strings not ints
does he not want the addition done????
how will that work??
__str__self()
molten bramble
thats a function on the class
austere crest
__str__ is a function for console output formatting
austere crest
also why does your add and sub have the other function
like add has sub as well
and sub has add as well
molten bramble
`__str__` is a function for console output formatting
technically... that'd be __repr__
__str is for anything that converts it to string
frank granite
beause each class has to implement the functions in IValue
austere crest
doesnt pythons print call __str__ implicitly?
austere crest
beause each class has to implement the functions in IValue
dont put them in IValue?
molten bramble
this is the code phind gave me when I asked it a bunch of questions about the co...
thats some decent code actually.
the problem it solves makes no sense though.. but the code looks decent
frank granite
dont put them in IValue?
we need to be able to use the methods recursively
austere crest
thats not shown in the UML
frank granite
it says so in the description
frank granite
``Create a custom class called Value that will hold a number. Then add decorator...
this
molten bramble
the problem statement is so bad.. if that was done better it'd be a better assignment
austere crest
it doesnt even mention an add or sub class
frank granite
oh wait
austere crest
the fuck is this assignment
frank granite
from abc import ABC, abstractmethod
class IValue(ABC):
@abstractmethod
def __str__(self):
pass
class Value(IValue):
def __init__(self, value):
self.value = value
def __str__(self):
return str(self.value)
class Add(IValue):
def __init__(self, left, right):
self.left = left
self.right = right
def __str__(self):
return str(self.left) + " + " + str(self.right)
class Sub(IValue):
def __init__(self, left, right):
self.left = left
self.right = right
def __str__(self):
return str(self.left) + " - " + str(self.right)
value1 = Value(int(input("Please give the largest number: ")))
value2 = Value(int(input("Please give the smallest number: ")))
print("\nAddition: ", Add(value1, value2))
print("Subtraction: ", Sub(value1, value2))
print("Adding 50 to first number then subtracting the second: ", Add(value1, Sub(Value(50), value2)))
fixed it
austere crest
has no decorators
molten bramble
yeah, but where are the decorators?
austere crest
also wouldnt you just use the deocrators themselves on the variable?
like the code before didnt really use the decorators efficiently either
molten bramble
no it was weird
austere crest
or can python only decorate funcs
molten bramble
By definition, a decorator is a function that takes another function and extends the behavior of the latter function without explicitly modifying it.
frank granite
I dont get it ;-;
molten bramble
neither do i
frank granite
well, I get it but IDK how to code it
molten bramble
oh really? i dont understand the problem
austere crest
same
austere crest
the assignment sounds like an unbeatable problem id have nightmares about
it doesnt make sense but in a dream id accept it
frank granite
:/
molten bramble
def this_is_the_function_it_wraps():
...something
def Add(func):
def wrapper(left, right):
return func(left) + func(right)
return wrapper
def Sub(func):
def wrapper(left, right):
return func(left) - func(right)
return wrapper
@Add
def add_values(value1, value2):
return value1.value + value2.value
@Sub
def sub_values(value1, value2):
return value1.value - value2.value
value1 = Value(int(input("Please give the largest number: ")))
value2 = Value(int(input("Please give the smallest number: ")))
print("\nAddition: ", add_values(value1, value2))
print("Subtraction: ", sub_values(value1, value2))
print("Adding 50 to first number then subtracting the second: ", add_values(value1, Sub(Value(50), value2)))
this? but I need the IValue too UGH
molten bramble
if that assignment was given to me, i'd write something else (and more fun) to demonstrate that i understand decorators lol
frank granite
I dont understand them 😢
and IDK enough about python to do this properly
if this was Java it would be a lot easier for me
molten bramble
how would you do this in java?
are decorators different in java?
as in.. the meaning of decorators?
molten bramble
the problem seems to require a java implementation as it looks like decorators have a different meaning in java
frank granite
.-.
frank granite
i have to use Python :/
molten bramble
you cant
molten bramble
maaybe
a decorator can alter a class and add add and sub functions to it.
but you should really use inheritance for that.
i dont know anymore, ive spend too many brain cycles on this
and need to sleep
frank granite
from abc import ABC, abstractmethod
class IValue(ABC):
@abstractmethod
def __call__(self):
pass
class Value(IValue):
def __init__(self, value):
self.value = value
def __call__(self):
return self.value
def Add(func):
def wrapper(left: IValue, right: IValue):
return func(left) + func(right)
return wrapper
def Sub(func):
def wrapper(left: IValue, right: IValue):
return func(left) - func(right)
return wrapper
def main():
value1 = Value(int(input("Please give the largest number: ")))
value2 = Value(int(input("Please give the smallest number: ")))
add_values = Add(Value)(value1, value2)
sub_values = Sub(Value)(value1, value2)
print("\nAddition: ", add_values())
print("Subtraction: ", sub_values())
print("Adding 50 to first number then subtracting the second: ", Add(Value)(Value(50), Sub(Value)(value1, value2))())
if __name__ == "__main__":
main()
hhmmm
would this work?????
austere crest
try it
frank granite
fuckong phone call .-.
crashes
add_values = Add(Value)(value1, value2)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "Q2-Abstract-AI.py", line 17, in wrapper
return func(left) + func(right)
~^
TypeError: unsupported operand type(s) for +: 'Value' and 'Value'
from abc import ABC, abstractmethod
class IValue(ABC):
@abstractmethod
def __call__(self):
pass
class Value(IValue):
def __init__(self, value):
self.value = value
def __call__(self):
return self.value
def Add(func):
def wrapper(left: IValue, right: IValue):
return func(left) + func(right)
return wrapper
def Sub(func):
def wrapper(left: IValue, right: IValue):
return func(left) - func(right)
return wrapper
@Add
def add_values(value1: IValue, value2: IValue):
return value1() + value2()
@Sub
def sub_values(value1: IValue, value2: IValue):
return value1() - value2()
def main():
value1 = Value(int(input("Please give the largest number: ")))
value2 = Value(int(input("Please give the smallest number: ")))
print("\nAddition: ", add_values(value1, value2))
print("Subtraction: ", sub_values(value1, value2))
print("Adding 50 to first number then subtracting the second: ", add_values(Value(50), sub_values(value1, value2)))
if __name__ == "__main__":
main()
I just get error
Traceback (most recent call last): File "Q2-Abstract-AI.py", line 42, in <module> main() File "Q2-Abstract-AI.py", line 37, in main print("\nAddition: ", add_values(value1, value2)) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "Q2-Abstract-AI.py", line 17, in wrapper return func(left.__call__()) + func(right.__call__()) ^^^^^^^^^^^^^^^^^^^^^ TypeError: add_values() missing 1 required positional argument: 'value2'
molten bramble
You're not using the decorators
frank granite
how use?
molten bramble
Oh wait you are
frank granite
also, the UML calls for only one value being used....
do we just hardcode a second value?
molten bramble
But they don't provide 2 args to the called function. And what are they even doing
frank granite
there is no sample output
molten bramble
Ok, really out now
austere crest
gotta love functional programming
frank granite
ok fuck this question..need to try the next one :/
Suppose we want to buy a stock for some amount, at some given price, and we have to strategize to decide, depending upon the strategy, we will change the amount for which we want to buy the stock. And we will change the price at which we would like to buy the stock. Assume that we have two strategies, one is aggressive, and one is passive. If we are moving with aggressive strategy, then what we will do is we will invest our whole amount at the current price of the stock. And if we are moving with the passive strategy, then what we will do is we would invest only 50% of the amount and that to at 90% of the current price. So, we will wait in this case so that the stock price comes down to the 90% of its current one, and then only we will invest, and we will invest only half of our amount i.e., 50%. So, these are the two strategies which we would like to use and whenever we are buying the stock, we will specify with which strategy we are moving with. Use python to demonstrate above concept of strategy design pattern.
austere crest
i really wonder why your java/c# position only has python questions
frank granite
SAME
.-.
maybe setting up the IDE to run this code would take too much time for them .-. instead of just runing a single .py file at terminal
frank granite
Im am using PyCharm
frank granite
Why does Python want two lines of blank space between function defs?
frank granite
How do I turn these into BCNF tables???
They should already be 3NF
Customer (custNo, custName) Outlet (outletNo, outletLoc) Car (carReg, make, model) CustomerCar (custNo, id) Car (carReg, id): Hire (hireNo, hireDate, custNo, carReg, outletNo) HireOutlet (hireNo, outletNo)
frank granite
different job offer
austere crest
did you learn any database engineering?
frank granite
yes
but up to 3NF
BCNF seems to be 3NF but with whatever "X should be a superkey for every functional dependency (FD) X−>Y in a given relation. " means
outer wadi
bump