Python格式化输出字符串方法小结【%与format】

>>> print("{:,}".format(123456))#输出1234,56123,456>>> print("{a:w^8}".format(a="8"))#输出www8wwww,填充wwww8wwww>>> print("%.5f" %5)#输出5.0000005.00000>>> print("%-7s3" %("python"))#输出python 3python 3>>> print("%.3e" %2016)#输出2.016e+03,也可以写大E2.016e+03>>> print("%d %s" %(123456,"jb51"))#输出123456 jb51123456 jb51>>> print("%(what)s is %(year)d" % {"what":"this year","year":2016})#输出this year is 2016this year is 2016>>> print("{0}{1}".format("hello","fun"))#输出hellofun,这与CSharp的格式化字符(占位符)相似hellofun>>> print("{}{}{}".format("jb51",".","net"))#输出vevb.comvevb.com>>> print("{a[0]}{a[1]}{a[2]}".format(a=["jb51",".","net"]))#输出vevb.comvevb.com>>> print("{dict[host]}{dict[dot]}{dict[domain]}".format(dict={"host":"www","domain":"vevb.com","dot":"."}))#输出www.vevb.comwww.vevb.com>>> print("{a}{b}".format(a="python",b="3"))#输出python3python3>>> print("{who} {doing} {0}".format("python",doing="like",who="I"))#输出I like pythonI like python>>>