class BaseException fixed_args fixed_msg None default_msg args_sep rep

class BaseException:
    
    fixed_args=()
    fixed_msg=None

    default_msg=''

    args_sep=','

    repr_func=str
    
    capitalize_msg=False
    sign_after_msg=''
    
    fancy_output=False
    
    def __init__(self,*args,**kwargs):
        self.args=args
        self.kwargs=kwargs

    def __call__(self,*args,**kwargs):
        self.__init__(args,kwargs)
        return self
    
    def __str__(self):
        self.process_opts()
        output=self.process_args()
        
        if self.fancy_output:
            return '\n\n'+output+'\n'
        return output
           
    def process_opts(self):
        for name,value in self.kwargs:
            setattr(self,name,value)
    
    def process_args(self):
        args=self.fixed_args+self.args

        if args:
            
            if self.fixed_msg:
                msg=self.fixed_msg
                _args=args
            else:
                msg=args[-1]
                _args=args[:-1]
        
            if self.capitalize_msg:
                msg=msg.capitalize()
                
            if self.sign_after_msg:
                msg+=self.sign_after_msg
            
            str_args=self.args_sep.join(self.repr_func(arg) for arg in _args)
        
            if str_args:
                return "%(str_args)s: %(msg)s"  %locals()
            
            return self.repr_func(msg)
            
        return self.repr_func(self.default_msg)