import time
# # 1970.1.1当现在已经度过了多少秒打印当前时间
# t1 = time.time()
# print(t1)
# # 睡眠 sleep
# time.sleep(2)
# # 打印当前时间
# t2 = time.time()
# print(t2)
# print(t2-t1)
# local 当地的
t2 = time.localtime()
print(t2)
# wday week day year of day 47
# isdst 夏令时 电
print(time.strftime("%Y-%m-%d %H:%M:%S ", time.localtime()))
print(time.strftime("%H:%M ", time.localtime()))
# 日历
import calendar
cal = calendar.month(2020,2)
print(cal)
cal2 = calendar.calendar(99999999)
print(cal2)
import time
t1 = time.time()
# 1-100的和
我要求和 = 0
for i in range(10000001):
我要求和 = 我要求和 + i
print(我要求和)
t2 = time.time()
print("%f"%(t2-t1))