(option, value)
return validate_string(option, value)
Validates that 'value' is an instance of `basestring` or `None`.
Validates that 'value' is an instance of `basestring` or `None`.
Validates that value is an instance of basestring or None .
def validate_string_or_none(option, value):
    """Validates that 'value' is an instance of `basestring` or `None`.
    """
    if value is None:
        return value
    return validate_string(option, value)
def validate_string_or_none ( option , value ) : if value is None : return value return validate_string ( option , value )