计算两个日期之间的时间差，并以总小时数给出输出，生成的输出为####，这是错误的

from datetime import datetime

def calculate_time_difference(start_date, end_date):
    format = "%Y-%m-%d %H:%M:%S"  # 日期时间格式
    start_datetime = datetime.strptime(start_date, format)
    end_datetime = datetime.strptime(end_date, format)
    time_difference = end_datetime - start_datetime
    total_hours = int(time_difference.total_seconds() / 3600)  # 将时间差转换为总小时数
    return total_hours

start_date = "2022-01-01 10:00:00"
end_date = "2022-01-02 15:30:00"
output = calculate_time_difference(start_date, end_date)
print(output)  # 输出：29