How to remove underlining from some titles in PyCharm?

Question

Python

I decided to create a project in PyChram, wrote all the names and got this, can you tell me how to remove it or what's the problem?

Answer 1

where is the sequel? The IDE quite naturally swears at incorrect syntax and other errors, this is one of its functions. Complete the syntactic construction, the underline disappears

def F(n):
    pass

PS It is customary to give names to functions / methods with a small letter, separating words with a subscript dash, class names - CamelCase

Answer 2

if you write without errors, then there will be no red underline