TypeError: unsupported type for timedelta days component: Series

出现问题原因：不支持series数据类型。

解决方法：
https://stackoverflow.com/questions/66775489/integer-to-date-in-python-unsupported-type-for-timedelta-days-component-series

数据类型转换：pandas.to_datetime

具体代码：
已知起始日期和间隔（单位为秒），计算enddate：

import numpy as np
import pandas as pd
import time,datetimeexcel_path = r'.xlsx file path '
data = pd.read_excel(excel_path)data['delta_time'] = data.delta_time #加载用到的时间变量#新增一列，用来存放数据日期
col_name = data.columns.tolist()
col_name.insert(14,'interval_day') #时间间隔
wb = data.reindex(columns = col_name)data['interval_day'] = data['delta_time']/3600/24

def serial_date_to_string(srl_no):new_date = datetime.datetime(2018,1,1,0,0) + datetime.timedelta(srl_no - 1)return new_date.strftime("%Y-%m-%d")data['endDate'] = data['interval_day'].apply(serial_date_to_string)
data['endDate']

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