human
Complete the below
def export_date_time(format):

    ''''A wrapper around strftime. Also returns \'\' if the input is None.
    Args:
    format: Format string for strftime.
    Returns:
    Single argument method which convers a datetime into a string using format.'
    '''
 ... What is a the Python code you requested?
assistant
#Here is the Python code you requested.
    def export_date_time_lambda(value):
        if (not value):
            return ''
        return datetime.datetime.strftime(value, format)
    return export_date_time_lambda