Variable referenced before assignment error calling function

Question

this is my code

def bv(a):

     if a >= 100000:
         bv = "1"
     elif a >= 50000 and a < 100000:
         bv = "2"
     elif a >= 20000 and a < 50000:
         bv = "3"
     elif a >= 10000 and a < 20000:
         bv = "4"
     elif a > 5000 and a < 10000:
         bv = "5"
    
     return bv

but when I call that function, I get this error:

UnboundLocalError: local variable 'bv' referenced before assignment

I don't understand why. I'm a beginner in python

Answer 1

You need to use proper indentation:

def bv(a):

     if a >= 100000:
         bv = "1"
     elif a >= 50000 and a < 100000:
         bv = "2"
     elif a >= 20000 and a < 50000:
         bv = "3"
     elif a >= 10000 and a < 20000:
         bv = "4"
     elif a > 5000 and a < 10000:
         bv = "5"
     else:
         bv = ""
    
     return bv

The way you wrote it put the return bv outside of the function, and of course no variable bv exists outside of the function!

Also rec is not defined!

If indentation is not the problem, then none of your cases evaluate to true, you might want to add a default case. I added it to the code snipped.