Python3中常用模块-time模块
1：获取模块帮助文档
import time print(time.__doc__) print(dir(time)) for item in dir(time): print(item) print(help(time.time))print(help(time.strftime))print(help(time.strptime))
2：time模块方法
2.1：time.sleep(t)
time模块最常用的方法之一，用来睡眠或者暂停程序t秒，t可以是浮点数或整数。
2.2：time.time()
import?timeprint(time.time()) # 1590908279.7763638
2.3：gmtime([seconds])? 时间戳-->UTC结构化时间
将一个时间戳转换为UTC时区的结构化时间。可选参数secs的默认值为time.time()。
2.4：localtime([seconds]) 时间戳-->本地结构化时间
将一个时间戳转换为当前时区的结构化时间。如果secs参数未提供，则以当前时间为准，即time.time()。
import time print(time.time()) # 1590908279.7763638 print(time.gmtime())print(time.localtime())print('*'*20)print(time.gmtime(1580908279))print(time.localtime(1580908279)) """1590908802.0024452time.struct_time(tm_year=2020, tm_mon=5, tm_mday=31, tm_hour=7, tm_min=6, tm_sec=42, tm_wday=6, tm_yday=152, tm_isdst=0)time.struct_time(tm_year=2020, tm_mon=5, tm_mday=31, tm_hour=15, tm_min=6, tm_sec=42, tm_wday=6, tm_yday=152, tm_isdst=0)********************time.struct_time(tm_year=2020, tm_mon=2, tm_mday=5, tm_hour=13, tm_min=11, tm_sec=19, tm_wday=2, tm_yday=36, tm_isdst=0)time.struct_time(tm_year=2020, tm_mon=2, tm_mday=5, tm_hour=21, tm_min=11, tm_sec=19, tm_wday=2, tm_yday=36, tm_isdst=0)"""
2.5：time.ctime(seconds)? 时间戳-->本地格式化字符串
把一个时间戳转化为本地时间的格式化字符串。默认使用time.time()作为参数。
import time print(time.ctime())print(time.ctime(time.time()))print(time.ctime(1580908279)) """Sun May 31 15:12:56 2020Sun May 31 15:12:56 2020Wed Feb 5 21:11:19 2020"""
2.6：time.asctime([tuple])? 结构化时间-->格式化时间字符串
把一个结构化时间转换为Sun May 31 15:15:36 2020这种形式的格式化时间字符串。默认将time.localtime()作为参数。
import time print(time.asctime())print(time.asctime(time.localtime()))print(time.asctime(time.localtime(1580908279))) """Sun May 31 15:15:36 2020Sun May 31 15:15:36 2020Wed Feb 5 21:11:19 2020"""
2.7：time.mktime(tuple)? ?结构化时间-->时间戳
将一个结构化时间转化为时间戳。time.mktime()执行与gmtime(),localtime()相反的操作，它接收struct_time对象作为参数,返回用秒数表示时间的浮点数。
import timeprint(time.mktime(time.localtime())) # 1590909638.0
2.8：strftime(format[, tuple])? ?结构化时间-->时间字符串
把一个struct_time（如time.localtime()和time.gmtime()的返回值）转化为格式化的时间字符串，显示的格式由参数format决定。如果未指定t，默认传入time.localtime()。
import timeprint(time.strftime("%Y-%m-%d %H:%M:%S")) print(time.strftime("%Y-%m-%d %H:%M:%S",time.gmtime())) """2020-05-31 15:25:372020-05-31 07:25:37"""""" %Y Year with century as a decimal number. %m Month as a decimal number [01,12]. %d Day of the month as a decimal number [01,31]. %H Hour (24-hour clock) as a decimal number [00,23]. %M Minute as a decimal number [00,59]. %S Second as a decimal number [00,61]. %z Time zone offset from UTC. %a Locale's abbreviated weekday name. %A Locale's full weekday name. %b Locale's abbreviated month name. %B Locale's full month name. %c Locale's appropriate date and time representation. %I Hour (12-hour clock) as a decimal number [01,12]. %p Locale's equivalent of either AM or PM."""
2.9：time.strptime(string, format)? ?时间字符串-->结构化时间
将格式化时间字符串转化成结构化时间。该方法是time.strftime()方法的逆操作。
import timestime = "2020-05-31 15:25:37"st = time.strptime(stime,"%Y-%m-%d %H:%M:%S")print(st)print(time.mktime(st)) # 转换为时间戳"""time.struct_time(tm_year=2020, tm_mon=5, tm_mday=31, tm_hour=15, tm_min=25, tm_sec=37, tm_wday=6, tm_yday=152, tm_isdst=-1) %Y Year with century as a decimal number. %m Month as a decimal number [01,12]. %d Day of the month as a decimal number [01,31]. %H Hour (24-hour clock) as a decimal number [00,23]. %M Minute as a decimal number [00,59]. %S Second as a decimal number [00,61]. %z Time zone offset from UTC. %a Locale's abbreviated weekday name. %A Locale's full weekday name. %b Locale's abbreviated month name. %B Locale's full month name. %c Locale's appropriate date and time representation. %I Hour (12-hour clock) as a decimal number [01,12]. %p Locale's equivalent of either AM or PM."""
3:时间格式转换
3.1:时间格式转换汇总：
# encoding=gbkimport time# stime 与 format需要对应def str2time(stime,format="%Y-%m-%d %H:%M:%S"): st = time.strptime(stime,format) return time.mktime(st) # return time.mktime(time.strptime(stime,format)) if __name__ == "__main__": print(str2time("2020-05-31 15:58:34" )) print(str2time("2020-05-31 15","%Y-%m-%d %H" )) print(str2time("2020-05-31","%Y-%m-%d" )) """1590911914.01590908400.01590854400.0"""
3.2 时间戳-->格式化字符串
# encoding=gbkimport time def time2str(itime,format="%Y-%m-%d %H:%M:%S"): st=time.localtime(itime) return time.strftime(format,st) # return time.strftime(format,time.localtime(itime)) if __name__ == "__main__": print(time2str(1590911914)) print(time2str(1590854400,"%Y-%m-%d %H")) """2020-05-31 15:58:342020-05-31 00"""
- 发表于:
- 原文链接：https://kuaibao.qq.com/s/20200805A0400C00?refer=cp_1026
- 腾讯「腾讯云开发者社区」是腾讯内容开放平台帐号（企鹅号）传播渠道之一，根据《腾讯内容开放平台服务协议》转载发布内容。
- 如有侵权，请联系 cloudcommunity@tencent.com 删除。
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