#🔒 yo
night vigil
you want to return True and return False
solar tulip
will attempt hold on
half pike
because you instantly return when you call the funciton
night vigil
will attempt hold on
also that is not how you check multiple conditions
your syntax is wrong
solar tulip
also that is not how you check multiple conditions
yeah we havent even gone over this part in my class yet
half pike
def grader(a, b, c):
return
I was just having fun with my last homework and wanted to do some more lmao \
idk what im doing doe
oh yeah I didn't write the def part that was my professor
half pike
you can delete everything after your first return it will never be reached
fleet canyon
python only sees a line with return and no values, so it returns None
you must specify the value you want to return in the same line as the return statement, as in return True or return False
you should format as "if ..., return True, otherwise return False" rather than "return if ... then ... otherwise ...)"
fleet canyon
the moment Python sees the return statement it will return whatever is on that line and ignore the rest of the function
solar tulip
okay okay but what if I need multiple lines
yk like not everything can be fit into one line of code
half pike
just do not return in the first line 😂
fleet canyon
do whichever logic those multiple lines entail first, and only then return their result
solar tulip
just do not return in the first line 😂
so my shit should be above return?
half pike
yes a return ends the function and jumps back to the caller
fleet canyon
you can have multiple return statements inside of different if/elif/else branches, but it will stop the function as soon as it hits a branch with a return statement
solar tulip
BRO WHY DID MY FUCKIN PROFESSOR NEVER SAY THAT
oh my god
the last assignment I did would've been so much easier
ok thanks guys
fleet canyon
also, if ...: return True // else: return False is redundant. try to think a bit about how to simplify it 😛
solar tulip
also, `if ...: return True // else: return False` is redundant. try to think a b...
oh so itll just return false if its not true?
typing that out makes sense but yk
I just assume I need to specify everything lmao
fleet canyon
if you don't explicitly return something, it will return None, but you could return an expression instead of just a literal
if you're checking if an expression has some exact value just to return that exact value, you could return the expression directly
just like how if condition == True: is redundant and equivalent to if condition: in most cases
half pike
💀
half pike
def grader(a,b,c):
return True
this is what your function does
half pike
wait so itll always return true
correct
solar tulip
okay we do be getting slightly somewhere
nvm :/
oh its printing True
it does genuinely nothing
how tf do you check values then man I dont get it
I need someone to explain this with like crayon and a napkin
fleet canyon
https://gyazo.com/7af8d86d566896a5553d03215a54f659
remember, Python will execute operations sequentially, one line at a time, parsing the statements and expressions to determine what to do
things like a == b, x + 2, z > y are expressions and give you a value based on what you're telling python to do with these variables
things like variable = ..., if ...:, return xyz are statements and determine the flow of the program
You must provide values for the statements to operate on, and they will only care about what you explicitly give to them
in that image, you have a bunch of expressions doing comparison operations but you don't have any statements that use their results
solar tulip
so I need if statements?
half pike
no
solar tulip
):
fleet canyon
so I need if statements?
You have to use the result of the expressions in some way
not necessarily if statements, just think a bit and maybe try to draw a flowchart indicating which operations you have to check, and how you have to use their outputs
solar tulip
if this was Scratch it'd be all over rn. Js.
fleet canyon
if this was Scratch it'd be all over rn. Js.
Show how you would do it in Scratch
solar tulip
I was joking I have never touched scratch in my entire life.
fleet canyon
I'm not even kidding, I really mean it.
solar tulip
only prior programming ive done is like
2 tutorial on c#
also I just wanna say yk I have had some wins ok hold on
half pike
simply writing an expression in the code and never using it is useless, the expression is evaluated and the result of the evaluation is simply deleted immediately by garbage collector if you do not use or save it, i.e. you can treat loose expressions as if they were not there, they do nothing (except wasting some processing time)
solar tulip
simply writing an expression in the code and never using it is useless, the expr...
ok like how all of my a > b are doing nothing
so I need uhhhh
half pike
ok like how all of my a > b are doing nothing
correct
solar tulip
thingys to use the info from a > b
but apparently that thingy is not an if statement
half pike
you want to combine them and use them for the return
solar tulip
okay how do you combine
fleet canyon
simply writing an expression in the code and never using it is useless, the expr...
||I was avoiding saying that as they can have side effects (e.g. list.append() or print())...|| but yeah you may as well think of it like that for now
half pike
do you know logical junctors?
half pike
||I was avoiding saying that as they can have side effects (e.g. `list.append()`...
ah that's right, I didn't think about side effects at that moment.
solar tulip
YOU CAN USE THE WORD AND?
solar tulip
ok cool now I need to actually yk use the expressions results
half pike
fist combine the conditions to one using the andjunctor
fleet canyon
pretty sure that'll give you a syntax error
(about indentation)
half pike
and avg_exams will be evaluated to the truth value which the object itself has but i guess you want it to be greater than a number?
solar tulip
I ran it, it didnt do anything
wait no I didnt
hold on
I forgot I changed it
okay it does
half pike
no need to run this
solar tulip
ran it
half pike
your code is nonsense, now care about combine the conditon correct to one
your approach is wrong
you missed to do avg_exams > some value
half pike
avg exams and avg hw both have to be greater than 75
than do that
you did not code that
half pike
can I not just combine the two
no
solar tulip
so I can or cant combine?
half pike
you can combine logical expressions with logical junctors by the rules of boolean algebra not by things that may make sense to you in english
python is a programming language not english
solar tulip
ok I give up for now
ill prob know what to do when we actually go over it in class
thanks fellas
yoo it actually did something
we are so back
half pike
it is the same Redundancy we were trying to get rid of
solar tulip
does the redundancy actually create any issues besides being slower
half pike
insted of your code you could just do:
def grader(a,b,c):
return c > 17
why would you want to write bad code instead of good code
solar tulip
because I'd rather write bad code and then make it better than just not write any at all because I was too focused on making it the best to start with
optimized it doe
now I just have to somehow link 3 more variables together
half pike
you would only have to combine the conditions correctly and then return the combined condition. you almost had it. you would only have to correct the error in your boolean expression
just do a andbetween each condition
and than return the combined expression
solar tulip
):
sean my code fucking sucks dude
so Im assuming this is now ONLY caring about attendance and then returns True
so how tf do I make it also care about the other two
solar tulip
but it always returns false unless I change the attendance to a number < 17
or 17< ig
you get it
disregard that
can you use the word "or"
half pike
it does return true if the first variable is greater than 17 and the second variable is greater than 75 and the third variable is greater than 75 and only than in every other case it is false
maybe you should tell us what your task is when this is not what you want
fleet canyon
what do you expect for python to do with ... and avg_exams or avg_hx > 80?
half pike
https://gyazo.com/24e7d2da46c6cf66a161a814c5d12dfa
because that is the value of avg_exams and this is true and the end of a chained and
solar tulip
how in the fuck did it return 76
I feel like I just tried to solve 2+2 and got the answer blue
solar tulip
what do you expect for python to do with `... and avg_exams or avg_hx > 80`?
I DONT KNOW
TEN MINUTES AGO I DIDNT KNOW YOU COULD USE THE WORD AND
Im wingin it ok
fleet canyon
I feel like I just tried to solve 2+2 and got the answer blue
!e print("red" or "blue" == "green")
formal owlBOT
!e print("red" or "blue" == "green")
:white_check_mark: Your 3.12 eval job has completed with return code 0.
red
!e
a = 5 and 7
print(a)
it is 7 because for an and every value needs to be true so it will be evaluated to the last one that is true or the first one that is false and both 5 and 7 are true because everthing except 0 is true so the expression is true and is evalutated to the last value 7. that is why you get 76 in your case
formal owlBOT
!e
```py
a = 5 and 7
print(a)
```
it is 7 because for an and every value needs t...
:white_check_mark: Your 3.12 eval job has completed with return code 0.
7
ok so all I have to do is a long list of "and" 's
half pike
no
solar tulip
and itll check off each one
half pike
you do not understand how and works and what a boolean value is and that there is a difference between the result of a comparison and the boolean value the object has itself (which comes from __bool__)
solar tulip
true
half pike
read this
solar tulip
this is moon runes
idk what any of this means
nvm I get it
ok hold on
Idk how to do "or" with numbers
what do I do instead of "favourite fruit"
half pike
a = 9
b = 7
a and b == 7
is the combination of two boolean expressions
exp1: a
exp2: b == 7
first they will be evaluated seperatly
exp1: a = 9 = True because every number that is not 0 has the boolean value True so it is evaluated to True
exp2: b == 7 = 7 == 7 = True
and now the values become combined to a new expression through the and junctor and we have:
exp3: True and True = True because and returns True if both expressions are True
see my issue is only one of the values (either hw or exams) has to be greater than 80
so if I did
hw and exams > 80
wouldn't it check to see if both were greater than 80
half pike
no
half pike
hw and exams > 80
this checks what boolean value hw consists of and if exams is greater than 80
solar tulip
ok I will attempt hold on
ok now none of them work
they all return false
I need true, false, false
half pike
https://gyazo.com/7efa6d87a94766eb4c4f10184bf8adba
you did the same error again
half pike
yes (but i do not even know what your task is)
half pike
just send the task?
solar tulip
I think I did
half pike
no
solar tulip
https://gyazo.com/a4022d37e05fb7ce42c8256b1449bac1
yeah up here
#The attendance must be greater than 16 to pass.
#The avg_exams and the avg_hw must be greater than 75.
#Either avg_exams or avg_hw must be greater than 80 (or both of them).
returns should be
True
false
false
solar tulip
#The attendance must be greater than 16 to pass.
#The avg_exams and the avg_hw m...
also "pass" in this case is just returning true
and not passing is returning false
half pike
attendance > 16 and avg_exams > 75 and avg_hw > 75 and (avg_exams > 80 or avg_hw > 80)
?
solar tulip
I was close tho
half pike
without the brackets it would be allways true when avg_hw is greater than 80
