如何从"Y:m:d H:i:s“中减去"Y:m:d H:i:s”并以"H:i“返回结果

from datetime import datetime

def subtract_datetime(datetime_str1, datetime_str2):
    datetime1 = datetime.strptime(datetime_str1, "%Y:%m:%d %H:%M:%S")
    datetime2 = datetime.strptime(datetime_str2, "%Y:%m:%d %H:%M:%S")
    time_diff = datetime1 - datetime2
    hours = time_diff.seconds // 3600
    minutes = (time_diff.seconds % 3600) // 60
    return "{:02d}:{:02d}".format(hours, minutes)

result = subtract_datetime("2022:01:01 12:00:00", "2022:01:01 10:30:00")
print(result)  # 输出: 01:30