python之time常用方法

python之time常用方法

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时间获取

time

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print(time.time())
#1602245486.8395054 每次都不同，从1970年1月1日00:00 开始计算

ctime

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print(time.ctime())
#Fri Oct  9 20:15:18 2020

gmtime

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print(time.gmtime())
#time.struct_time(tm_year=2020, tm_mon=10, tm_mday=9, tm_hour=12, #tm_min=20, tm_sec=21, tm_wday=4, tm_yday=283, tm_isdst=0)

时间格式化

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strftime

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cs =time.gmtime()
print(time.strftime("%Y-%m-%d %H:%M:%S",cs))
#2020-10-09 12:28:23
cs =time.gmtime()
print(time.strftime("%Y-%m-%d %a %p %I:%M:%S",cs))
#2020-10-09 Fri PM 12:32:00

strptime

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tm ="2020-10-9 20:33:25"
print(time.strptime(tm,"%Y-%m-%d %H:%M:%S"))
#time.struct_time(tm_year=2020, tm_mon=10, tm_mday=9, tm_hour=20, #tm_min=33, tm_sec=25, tm_wday=4, tm_yday=283, tm_isdst=-1)

程序计时

sleep

单位是秒，可以为小数

perf_counter

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单位是 秒

start = time.perf_counter()
time.sleep(3)
end = time.perf_counter()

print("时间间隔为：",end - start)
#时间间隔为： 3.0000780999999996