hey guys, im trying to write a code thatclaculates how much should I tip in a restaurant, but my code isnt working, and I also dont know whats wrong. i would appreciate it if you guys could just tell me which part is wrong so that I can fix it as im still learning and want to figure it out myself :)
#🔒 Python tip calculator sos
ruby beacon
iron crescentBOT
hey guys, im trying to write a code thatclaculates how much should I tip in a re...
@ruby beacon
Python help channel opened
ruby beacon
def main():
dollars = dollars_to_float(input("How much was the meal? "))
percent = percent_to_float(input("What percentage would you like to tip? "))
tip = dollars * percent
print(f"Leave ${tip:.2f}")
def dollars_to_float(d):
original = float(input())
modified = original[1:]
return modified
def percent_to_float(p):
original = float(input())
modified = original.replace("%"," ")
return (modified/100)
main()
rancid cosmos
Wait, what's not working?
hearty apex
```py
def main():
dollars = dollars_to_float(input("How much was the meal? "...
your functions are using duplicate input() statements instead of using the parameters passed into the function
rancid cosmos
Oh I see it, sorry for being here
lusty wedge
going through the code line by line to understand what's happening would probably have lead to the same conclusion
hearty apex
going through the code line by line to understand what's happening would probabl...
not if someone is new to working with functions
it might be obvious for people with experience
rancid cosmos
Or if he's stupid like me
ruby beacon
your functions are using duplicate input() statements instead of using the param...
i see, so if i want to convert the value of dollars to a float, I should replace input() with "dollars" ? but the variable is from a different function so it wudnt work ?
hearty apex
def dollars_to_float(d):
you've defined your function with a "parameter"
that's what d is here
ruby beacon
Or if he's stupid like me
everyone is learning here, including me, please dont say that
hearty apex
so d is the value you want to be working with inside the function
ruby beacon
`def dollars_to_float(d):`
ohhh! and since we have two input statments in def main, both the "percent" and "dollars" will be "d"?
lusty wedge
can I try?
hearty apex
dollars = dollars_to_float(input("How much was the meal? "))
percent = percent_to_float(input("What percentage would you like to tip? "))
No, I meant, sorry if I hurt you
hearty apex
you're taking input, and immediately passing it into the function
the first input gets passed into dollars_to_float
rancid cosmos
I meant like that's a posobility that I'm really stupid
hearty apex
and the 2nd input gets passed to percent_to_float
def dollars_to_float(d):
original = float(input())
modified = original[1:]
return modified
def percent_to_float(p):
original = float(input())
modified = original.replace("%"," ")
return (modified/100)
ohhh and so i can say def percent_to_float(p)?
hearty apex
if you look at your 2 functions, you have d as the parameter of your first one, and p as the parameter of the 2nd one
lusty wedge
@ruby beacon I think you have a fundamental misunderstanding of how parameters or variables work
let's clear that up
hearty apex
ohhh and so i can say def percent_to_float(p)?
No, p and d are parameters, which means when the function is called, the parameters become the value of what was passed in
ruby beacon
No, `p` and `d` are parameters, which means when the function is called, the par...
ohhh that makes it clearer, thank you
hearty apex
!e
def greeting(name):
print("Hello", name)
greeting("peacock")
greeting("fashoomp")
:white_check_mark: Your 3.12 eval job has completed with return code 0.
001 | Hello peacock
002 | Hello fashoomp
see how name is "peacock" on the first call, and then "fashoomp" on the 2nd?
we're using the parameter to represent whatever gets passed in
ruby beacon
we're using the parameter to represent whatever gets passed in
oooh okie, so in this case the parameter is called "name", and it is equal to whatever value we pass in, as fashoomp put it?
hearty apex
yes
ruby beacon
```py
def dollars_to_float(d):
original = float(input())
modified = orig...
so instead of a second input i shud put d and p? in each function
hearty apex
yes exactly
lusty wedge
functions have their own enclosed name spaces, in which the variable name is assigned whatever object is passed as the first argument
hearty apex
you're already taking input from elsewhere and passing it in, there's no need to ask for input again within the function
def dollars_to_float(d):
original = float(input())
modified = original[1:]
return modified
also can you explain what you're trying to do with this function?
ruby beacon
also can you explain what you're trying to do with this function?
sure! btw ill try it out and keep this channe open for now to see how it goes
this is the prompt im working with:
lusty wedge
can you explain how your dollars_to_float() works, step by step?
hearty apex
try rewriting it first with the parameter instead of input
since it might ultimately change things
(it's not so simple as just replacing input() with the parameter)
ruby beacon
can you explain how your `dollars_to_float()` works, step by step?
so according to my understanding, it takes the input, removes the dollar sign (i used [1:] for simplicity), and then returns the value (which was orignially a string/text) as a number (float)
to be the then multiplied to get the amount we shud tip
anyways i got an error that said i cant convert float to string
def main():
dollars = dollars_to_float(input("How much was the meal? "))
percent = percent_to_float(input("What percentage would you like to tip? "))
tip = dollars * percent
print(f"Leave ${tip:.2f}")
def dollars_to_float(d):
original = float(d)
modified = original[1:]
return modified
def percent_to_float(p):
original = float(p)
modified = original.replace("%"," ")
return (modified/100)
main()
@ruby beacon the first thing you do is try to convert the argument to a float
hearty apex
yes exactly, you're trying to convert, and then remove the dollar sign
you must remove it first
lusty wedge
but how is that going to work when it still has the $ sign in front?
hearty apex
also while [1:] does work to remove the dollar sign, it does leave you with an edge case
which is the potential for a number being provided that doesn't have $ in front
lusty wedge
the assignment does assume that it has the $ in front
hearty apex
instead, you can use lstrip('$') which will be more reliable
lusty wedge
so that's not necessary
hearty apex
the assignment does assume that it has the $ in front
Yeah, but it's generally good to think of edge cases
ruby beacon
oooh that makes sense, cuz it wud get confused because of the signs
okay this is what i did
def dollars_to_float(d):
modified = original[1:]
original = float(d)
return modified
def percent_to_float(p):
modified = original.replace("%"," ")
original = float(p)
return (modified/100)
still not quite
think about what each variable represents
rancid cosmos
I gotta clarify something, are we good peacock?
ruby beacon
line 3 , 9 and 18
hearty apex
I gotta clarify something, are we good peacock?
We've all moved on, please don't bring this up
lusty wedge
where is the original variable defined?
hearty apex
def dollars_to_float(d):
modified = original[1:]
remember that d is going to be the dollar string
rancid cosmos
We've all moved on, please don't bring this up
Okay, thank you
hearty apex
like "$50.00"
ruby beacon
i see, gimme a sec, ill try to apply the things u guys taught me and get back
lusty wedge
when in doubt, going through the code line-by-line and trying to understand what each line does is tremendously helpful, even for experts
hearty apex
it means you wrote something structurally that python doesn't understand
share your code
ruby beacon
def dollars_to_float(d):
modified = d[1:]
x= float(modified)
return x
def percent_to_float(p):
modified= p.replace("%"," ")
y= float (modified)
return y/100
my code now btw
lusty wedge
where is this cd tip?
hearty apex
show the full code
ruby beacon
where is this `cd tip`?
yea i cant find it either
ruby beacon
show the full code
okie
lusty wedge
well how did you get that error then?
ruby beacon
def main():
dollars = dollars_to_float(input("How much was the meal? "))
percent = percent_to_float(input("What percentage would you like to tip? "))
tip = dollars * percent
print(f"Leave ${tip:.2f}")
def dollars_to_float(d):
modified = d[1:]
x= float(modified)
return x
def percent_to_float(p):
modified= p.replace("%"," ")
y= float (modified)
return y/100
main()
it looks like you tried to enter a shell command in the Python interpreter
ruby beacon
is this relevant?
i did these steps when i started the project a few days ago, my terminal doesnt say tip/$ anymore btw
hearty apex
well if you're trying to type cd tip into a python shell, that's not going to work
cd is a terminal command
not python
ruby beacon
well if you're trying to type `cd tip` into a python shell, that's not going to ...
shell is the top part right? and terminal the bottom?
hearty apex
I don't know where you're writing your code
ruby beacon
well if you're trying to type `cd tip` into a python shell, that's not going to ...
m not i promise, i sent all the code there is
lusty wedge
we can't see your screen
hearty apex
if you see >>> at the start of where you're typing, that's a python shell
ruby beacon
I don't know where you're writing your code
hearty apex
you've entered python shell mode
ruby beacon
bw, u see the numbers on top? if someone else has access to them, does that mean they can se emy filed?
hearty apex
type quit() and press enter
ruby beacon
type `quit()` and press enter
ok it worked
two questions: how does one enter themode
what does that mode entail/mean?
hearty apex
python shell is an interactive python session
where you can write a line of python code and get a result immediately
I don't use VSC so I'm not sure how you might have entered that mode
lusty wedge
did you launch python from the terminal?
ruby beacon
did you launch python from the terminal?
idk what that means (really appreciate ur guys's patience with me) but i click the horizontal triange / play button on the top right region of the ss i sent
ruby beacon
bw, u see the numbers on top? if someone else has access to them, does that mean...
:) ?
hearty apex
then perhaps your terminal remains in python mode after running a script
ruby beacon
GUYS IT WORKS it ALL WORKS THANK YOU SO MUCH
hearty apex
if you ever see the >>>, you'll have to type quit() to get out of that mode
ruby beacon
if you ever see the `>>>`, you'll have to type `quit()` to get out of that mode
will keep that in mind, tysm guys! u shud really get paid for this lol
hearty apex
Also just to show how you can simplify functions
def dollars_to_float(d):
return float(d[1:])
you don't need all of those other variables
ruby beacon
```py
def dollars_to_float(d):
return float(d[1:])
```
god thats smart
hearty apex
although I see how they can be helpful as a beginner when writing this out
ruby beacon
also
so im currently learning python from thsi edx course
hearty apex
yeah I recognize this as cs50
ruby beacon
do u guys have any other recommendations? clearly the concept of parameters and functions didnt register well thru this course
hearty apex
do u guys have any other recommendations? clearly the concept of parameters and ...
there's tons of resources online for just about every topic. Don't limit yourself to just one resource
.rp defining functions
quartz oxideBOT
hearty apex
this 2nd link here is a good one
iron crescentBOT
Python help channel closed