python获取昨天今天明天的开始结束时间

import time
import datetime

# 今天日期
today = datetime.date.today()
# 昨天时间
yesterday = today - datetime.timedelta(days=1)

# 明天时间
tomorrow = today + datetime.timedelta(days=1)
acquire = today + datetime.timedelta(days=2)

# 昨天开始时间戳
yesterday_start_time = int(time.mktime(time.strptime(str(yesterday), '%Y-%m-%d')))
# 昨天结束时间戳
yesterday_end_time = int(time.mktime(time.strptime(str(today), '%Y-%m-%d'))) - 1

# 今天开始时间戳
today_start_time = yesterday_end_time + 1
# 今天结束时间戳
today_end_time = int(time.mktime(time.strptime(str(tomorrow), '%Y-%m-%d'))) - 1

# 明天开始时间戳
tomorrow_start_time = int(time.mktime(time.strptime(str(tomorrow), '%Y-%m-%d')))
# 明天结束时间戳
tomorrow_end_time = int(time.mktime(time.strptime(str(acquire), '%Y-%m-%d'))) - 1

print ('今天时间戳')
print (today_start_time)
print (today_end_time)
print ('昨天时间戳')
print (yesterday_start_time)
print (yesterday_end_time)
print ('明天时间戳')
print (tomorrow_start_time)
print (tomorrow_end_time)