[New Rule] Replace f-string without any text with using value directly instead

Explanation

Analyze f-strings. If f-string has no text and only a passed value, then use that value directly.

Example 1

# Bad

foo = "bar"
my_text = f"{foo}"

# Good

foo = "bar"
my_text = foo

Example 2

# Bad

def my_func(foo: str):
    my_text = f"{foo}"

# Good
def my_func(foo: str):
    my_text = foo

Example 3

# Bad

my_number = 123
my_text = f"{foo}"

# Good

my_number = 123
my_text = str(foo)

[MartinThoma]

Aparently f-strings are ast.JoinedStr and the parameters are automatically parsed. Variables are ast.FormattedValue. So we can recognize when we have an f-string.

[AIGeneratedUsername]

Maybe I misunderstand. Why would simplify need to perform type checking to know that this pattern is incorrect?

You are right. Probably no type checking is required.