[FIXED] Python / Spyder - Undefined variable error, when variable is defined and shown in the environment. Code works even with the error

Issue

I am getting a strange error when defining variables in Python 4.1.5 (IDE:Spyder). However, even with the error, the code runs without any issues!

As you can see, the variable social_cost_of_carbon is stored as a variable, but I keep getting that error as show in picture 1 (the error writes: Undefined name 'social_cost_of_carbon' (Pyflakes E)

I feel that the way that i declare those variables might be the reason:

def convert_to_var(df):
    desc = []
    val = []  
    
    for i,row in df.iterrows():
        desc.append(i)
        val.append(row) 
        
    return dict(val)

val_dict = convert_to_var(IA)
locals().update(val_dict)

Since the code runs without any problems, I am not doing anything to resolve this. Do I need to worry and fix this, or do I just let it be and continue without dealing with the error since the code runs smoothly?

Thanking you in advance.

Solution

(Spyder maintainer here) As you guessed, the problem is that you're creating your variable dynamically with this line in your code:

locals().update(val_dict)

Since our linter can't find where that variable is properly declared, it reports that it's undefined. But it's safe for you to ignore that message.

Note: Since Spyder 5.1.0, you can avoid the linter error by adding a comment at the end of the problematic line of the form # noqa.

Answered By - Carlos Cordoba