如何使用pandas统计一列中具有特定字符串值的行数？

Failed to create completion as the model generated invalid Unicode output. Unfortunately, this can happen in rare situations. Consider reviewing your prompt or reducing the temperature of your request. You can retry your request, or contact us through an Azure support request at: https://go.microsoft.com/fwlink/?linkid=2213926 if the error persists. (Please include the request ID a9320d3b-75a0-4226-9665-ed4d20ec3a0c in your message.)