def __init__(self,*args,**kwargs):
        self.clearable = kwargs.pop('clearable', True)
        super(FileField, self).__init__(*args, **kwargs)
        self._prefix = kwargs.get('_prefix', '')
        self.clear_field = fields.BooleanField(default=False)
        if self.clearable:
            self._clear_name = '%s-clear'%self.short_name
            self._clear_id = self.id%'%s-clear'
            self._clear = self.clear_field.bind(form=None, name=self._clear_name, prefix=self._prefix, id=self._clear_id)
dataset/ETHPy150Open syrusakbary/Flask-SuperAdmin/flask_superadmin/form.py/FileField.__init__/swapped operands of `%`