🔒 how do i change this into a function that changes the weight per year?

[orchid warren]

weight = 16.5
moon_weight = 0.165
total_weight = 0
total_weight2 = 15

def Add(weight, moon_weight):
   total_weight = weight + moon_weight
   total_weight2=total_weight2+total_weight
   return total_weight


for year in range(1, 15):
   print(Add(weight, moon_weight))```

[cedar brook]

@orchid warren

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[orchid warren]

did some editing and got rid of an error, but now it won't print anything, why is that?

weight = 16.5
moon_weight = 0.165
total_weight = 0
total_weight2 = 15
for year in range(1, 15):
   def Add(weight, moon_weight):
      total_weight = weight + moon_weight
      total_weight2=total_weight2+total_weight
      return total_weight
      return total_weight2
      print(Add(weight, moon_weight))

#for year in range(1, 15):
   #print(Add(weight, moon_weight))```

[slate crown]

Because you never call the function. Why is def Add inside the loop?

[orchid warren]

part of experimenting, i get an error if it's outside

[slate crown]

I think you intended that last print to be outside of the function, but the function shouldn't be in the loop at all.

[orchid warren]

alright

[slate crown]

What's the error?

[orchid warren]

"UnoundLocalError: cannot access local variable 'total_weight2' where it is not associated with a value"

but i have it attached to the 15 above

[slate crown]

You need global total_weight2 at the top of the function. Because you'

're reassigning total_weight2, Python will treat it as a local by default. But if it's a local, there is no total_weight2 that exists before that line runs.

[orchid warren]

so i need to put global at the front?

[slate crown]

Just put global total_weight2 at the top of the function, on its own line.

You shouldn't be using globals, but since you are using globals and reassigning them, that global statement is necessary.

[orchid warren]

what should i use instead

[slate crown]

return. I'll note though that you can't have two returns like you have. As soon as return is reached, the function exits, so the return total_weight2 will never run.

[orchid warren]

so i don't need to call both then?

[slate crown]

!e

def func():
    print(1)
    return
    print(2)
func()

[cedar brook]

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

1

[orchid warren]

oh

[slate crown]

If you want to return two values at once, wrap them in a tuple: return total_weight, total_weight2.

!e

def func():
    return 1, 2
x, y = func()
print(x, y)

[cedar brook]

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

1 2

[orchid warren]

i'm rusty with tuples lol

[slate crown]

They're just immutable lists essentially.

If you understand lists, you basically understand tuples.

[orchid warren]

ok

brb

[orchid warren]

Back

[slate crown]

Ok

[orchid warren]

Btw do you know how to change the layout in visual studio?

Kinda worried I’ll still be confused about this later

[slate crown]

I'm assuming you mean VSCode?

And note sure. I only used VSCode briefly when it was first released.

[orchid warren]

ok

[cedar brook]

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