分类:编程语言
datetime模块当前日期datetime.date.today()datetime.date(2020,4,24)转换元祖>>>datetime.date.timetuple(datetime.date.today())time.struct_time(tm_year=2020,tm_mon=4,tm_mday=24,tm_hour=0,tm_min=0,tm_sec=0,tm_wday=4,tm_yday=115,tm_isdst=-1)当前时间,精确至毫秒>>>datetime.datetime.now()datetime.datetime(2020,4,24,10,54,20,538999)时间差>>>t1=datetime.datetime.now()>>>datetime.timede...
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这两组函数中区别很是类似,都是一个不改变之前的数组,一个改变数组本身resize和reshape>>>importnumpyasnp>>>a=np.arange(20).reshape(4,5)>>>aarray([[0,1,2,3,4],[5,6,7,8,9],[10,11,12,13,14],[15,16,17,18,19]])>>>a.reshape(2,10)array([[0,1,2,3,4,5,6,7,8,9],[10,11,12,13,14,15,16,17,18,19]])>>>aarray([[0,1,2,3,4],[5,6,7,8,9],[10,11,12,13,14]...
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