目标：把str类型的时间，以一天为准，建立开始和结束的时间戳，主要应用在企业微信的日程规范当中

数据如下图所示：

image.png

# 1、新建 end_time，即date的后一天
def time_end(data):
    start_time = data['date']
    start_time = datetime.datetime.strptime(start_time, '%Y-%m-%d')
    end_time = start_time + dateutil.relativedelta.relativedelta(days = 1)
    end_time = str(end_time)[:10]
    return end_time

data['end_time'] = data.apply(time_end, axis = 1)

# 2、开始时的 时间戳
def start_unix(data):
    start_time = datetime.datetime.strptime(data, '%Y-%m-%d')
    a = start_time.timetuple()
    b = time.mktime(a)
    c = int(b)
    return c

data['start_time'] = data['start_time'].apply(start_unix)

# 3、结束时的 时间戳
def end_unix(data):
    end_time = datetime.datetime.strptime(data, '%Y-%m-%d')
    a = end_time.timetuple()
    b = time.mktime(a)
    c = int(b)
    return c

data['end_time'] = data['end_time'].apply(start_unix)

print(data[['start_time', 'end_time']])

结果如下图所示：

image.png