🔒 Beginner's exercise error

[valid night]

Just started learning Python. Following a Youtube tutorial and this exercise is giving me the wrong result and I just can't fathom why.

I'm supposed to convert weight from kgs or lbs into the other unit. So I input weight in float, then I input the unit in string, and use an if function to convert it one way or the other.

In app.py, I get the lbs to kg conversion no matter what unit I input.
In app2.py, I get the wrong unit error no matter what unit I input.

[nimble tendon]

@valid night

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[delicate ether]

hi

[grizzled maple]

!or

[nimble tendon]

The or-gotcha

When checking if something is equal to one thing or another, you might think that this is possible:

# Incorrect...
if favorite_fruit == 'grapefruit' or 'lemon':
    print("That's a weird favorite fruit to have.")

While this makes sense in English, it may not behave the way you would expect. In Python, you should have complete instructions on both sides of the logical operator.

So, if you want to check if something is equal to one thing or another, there are two common ways:

# Like this...
if favorite_fruit == 'grapefruit' or favorite_fruit == 'lemon':
    print("That's a weird favorite fruit to have.")

# ...or like this.
if favorite_fruit in ('grapefruit', 'lemon'):
    print("That's a weird favorite fruit to have.")

[delicate ether]

it's

it's unit.upper()

[grizzled maple]

!e
next, .upper is the function, you need to call it, i.e.

text = 'hello'
print(text.upper)
print(text.upper())

[nimble tendon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

001 | <built-in method upper of str object at 0x7f2706142d60>
002 | HELLO

[valid night]

Ahhh, okay, okay, all of this is super helpful. Thank you 🙂

[delicate ether]

if you are using the second solution it's

elif unit == "k" or unit == "K"

[obsidian marsh]

Or better:

if unit in ["k", "K"]:

[delicate ether]

yes

[oak pulsar]

or

if unit.lower() == "k":

[delicate ether]

😐 🫃 🐟

[oak pulsar]

i mean i aint wrong tho right?

[delicate ether]

yea yea

i mean you are right

if ord(unit) == 75 or ord(unit) == 107

[oak pulsar]

XD,

[wraith karma]

if unit in "kK":

unit.lower() would be more standard

[delicate ether]

if unit in "kK" and len(unit)==1:

[obsidian marsh]

Nah, "kK" input is valid

[delicate ether]

?

[tough dune]

!e print("kK" in "kK")

[nimble tendon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

True

[delicate ether]

!e print("kK" in "kK" and len("kK") == 1)

[nimble tendon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

False

[delicate ether]

!e a=["K","k","kK","Kk"]; print([(item in "kK" and len(item)==1) for item in a])

[nimble tendon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

[True, True, False, False]

[oak pulsar]

!e unit = "K"; print(unit.lower() == "k")

[nimble tendon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

True

[nimble tendon]

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