解决python 两个时间戳相减出现结果错误的问题

import time 
str_time = "20200713203740"
time_temp = time.strptime(str_time, "%Y%m%d%H%M%S") # 字符串格式化成时间格式
time_stamp = time.mktime(time_temp)         # 格式化后的时间转换成时间戳
 
print(time_temp)
print(time_stamp)

from datetime import datetime 
x = 1594643860 
y_m_d = datetime.fromtimestamp(x).strftime('%Y%m%d')
h_s_m = datetime.fromtimestamp(x).strftime('%H:%S:%M')
print(y_m_d)
print(h_s_m)

import datetime 
# 将时间字符串转换成格式化的时间格式
time = "20190617 00:00:00"
time = datetime.datetime.strptime(time, "%Y%m%d %H:%M:%S")
 
# 在原来的时间上加6天
time = time + datetime.timedelta(days=6)
print(time)
 
# 将格式化的时间格式，转换成时间字符串
timestr = datetime.datetime.strftime(time, "%Y%m%d %H:%M:%S")
print(timestr)