详解Python time库的使用

>>> import time>>> time.time()1570530861.740123>>> time.ctime()'Tue Oct 8 18:34:27 2019'>>> time.gmtime()time.struct_time(tm_year=2019, tm_mon=10, tm_mday=8, tm_hour=10, tm_min=34, tm_sec=52, tm_wday=1, tm_yday=281, tm_isdst=0)

time.strftime(format[, t])format  格式字符串。t  可选的参数t是一个struct_time对象。python中时间日期格式化符号：%Y 年份%m 月份%B 月份名称 January%b 月份名称缩写 Jan%d 日期%A 星期 Monday%a 星期缩写 Mon%H 小时 24%h 小时 12%p 上下午%M 分钟%S 秒>>> t=time.gmtime()>>> time.strftime("%Y-%m-%d %H:%M:%S", t)'2019-10-08 10:38:06'>>> time.strftime("%Y-%B-%d-%A-%H-%p-%S")'2019-October-08-Tuesday-18-PM-50'>>> time.strftime("%A-%p")'Tuesday-PM'>>> time.strftime("%M:%S")'39:59'

>>> start = time.perf_counter()>>> start684.980333384>>> end = time.perf_counter()>>> end696.094559111>>> end-start11.114225726999962

#TextProBarV3.pyimport timescale = 40print('执行开始'.center(scale//2,'-'))start = time.perf_counter()for i in range(scale+1):  a = '*' * i  b = '.' * (scale - i)  c = (i / scale) * 100  dur = time.perf_counter() - start  print("/r{:^3.0f}%[{}->{}]{:.2f}".format(c,a,b,dur),end='')  time.sleep(0.1)print('/n'+'执行结果'.center(scale//2,'-'))

#DrawSevenSegDisplay.pyimport turtle, datetimedef drawGap(): #绘制数码管间隔  turtle.penup()  turtle.fd(5)def drawLine(draw):  #绘制单段数码管  drawGap()  turtle.pendown() if draw else turtle.penup()  turtle.fd(40)  drawGap()  turtle.right(90)def drawDigit(d): #根据数字绘制七段数码管  drawLine(True) if d in [2,3,4,5,6,8,9] else drawLine(False)  drawLine(True) if d in [0,1,3,4,5,6,7,8,9] else drawLine(False)  drawLine(True) if d in [0,2,3,5,6,8,9] else drawLine(False)  drawLine(True) if d in [0,2,6,8] else drawLine(False)  turtle.left(90)  drawLine(True) if d in [0,4,5,6,8,9] else drawLine(False)  drawLine(True) if d in [0,2,3,5,6,7,8,9] else drawLine(False)  drawLine(True) if d in [0,1,2,3,4,7,8,9] else drawLine(False)  turtle.left(180)  turtle.penup()  turtle.fd(20)def drawDate(date):  turtle.pencolor("red")  for i in date:    if i == '-':      turtle.write('年',font=("Arial", 18, "normal"))      turtle.pencolor("green")      turtle.fd(40)    elif i == '=':      turtle.write('月',font=("Arial", 18, "normal"))      turtle.pencolor("blue")      turtle.fd(40)    elif i == '+':      turtle.write('日',font=("Arial", 18, "normal"))    else:      drawDigit(eval(i))def main():  turtle.setup(800, 350, 200, 200)  turtle.penup()  turtle.fd(-350)  turtle.pensize(5)  drawDate(datetime.datetime.now().strftime('%Y-%m=%d+'))  turtle.hideturtle()main()