python程序设计课件第2章格式化输出

Python格式化输出%和format整数的输%ooct八进制%ddec十进制%xhex十六进制>>>>>>print('%o'%20)>>>print('%d'%20)>>>print('%x'%20)浮点数输%f%.3f3%e%.3e，3%g%.3g3print('%f' #6print('%.1f' 1小print('%e #6print('%.3e' #3print('%g #6print('%.7g' #7print('%.2g' #2round(number[,numberndigits0。xn用四舍五入的规则，但是碰到.5>>>>>> #1>>> #33>>> #32>>> #无法理解，查阅一些资料是说python2>>> #2>>> #>>> #(3)字符串输出%10s10%-10s10%.2s2%10.2s——10print('%s o #oprint('%20s' o #20oprint('%-20s' o #20o>>>print('%.2s'>>>print('%10.2s'>>>print('%-10.2s'o #取2o #2o #2带数字编号，可调换顺序，即“{1}print('{ #o>>>print('{0}o>>>print('{0}{1} # #o >>>print('{1}{1}{0}'.format( worldworld print('{a{tom # o>>>>>>'{0},{1},{2}'.format('a','b','a,b,>>>'{},{},{}'.format('a','b','c') 3.1+版本支持'a,b,c'>>>'{2},{1},{0}'.format('a','b','c,b,'{2},{1}, #'c,b,'{0}{1}{0}'.format('abra', 'Coordinates:'Coordinates:{latitude},{longitude}'.format(latitude='37.24N',longitude='-115.81W')'Coordinates:37.24N,-115.81W'>>>coord={'latitude':'37.24N','longitude':'->>>'Coordinates:{latitude},{longitude}'.format(**coord)'Coordinates:37.24N,-115.81W'>>>>>>c=3->>>('Thecomplexnumber{0}isformedfromtherealpart{0.real} 'andtheimaginarypart'Thecomplexnumber(3-5j)isformedfromtherealpart3.0andtheimaginarypart->>>class definit(self,x, self.x,self.y=x, defstr return'Point({self.x},>>>str(Point(4,'Point(4,>>>coord=(3,>>>'X:{0[0]}; Y:{0[1]}'.format(coord)'X:3; Y:5'>>>a={'a':'test_a','b':>>>'X: Y:'X: Y:format##>>>"{0}{1}".format( oworld'##可在字符串前加f#可在字符串前加fformat>>>a>>>b=>>>f"{a}onamename='jack'age=18job="IT"salary=print(f'mynameis{name.capitalize()}.')print(f'Iam{age:*^10}yearsold.')pri