Type Error: 'in' object is not callable

[Yoriz]

All of your method names apart from __init__, when called assign the method name to an attribute value.
Example

class stats:
    
    def mode(self): # method name is mode
        self.mode = s.mode(self.value) # mode is now assigned as an attribute value
        return(self.mode)
        ...
        ...

When mode is called the first time it works, but when it is called a second time it doesn't because it is now an int that can't be called.