Python 格式符大聚会之%r

一、%r是一个万能的格式符，它会将后面给的参数原样打印出来

示例代码

# -- coding:utf8 --
#%r是一个万能的格式符，它会将后面给的参数原样打印出来
formatter="%r %r %r %r"
print formatter % (1,2,3,4)
print formatter % ("one","two","three","four")
print formatter % (True,False,False,True)
print formatter % (formatter,formatter,formatter,formatter)
print formatter % (
"I had this thing.",
"That you could type up right.",
"But it didn't sing.",
"So I said goodnight."
)

二、 将  %r  和  %s  比较一下

# coding:utf-8

#%r  打印出来的是你写在脚本里的内容，而  %s  打印的是你应该看到的内容。

tabby_cat="\tI'm tabbed in."

print "%r" %tabby_cat  #打印出来  "\tI'm tabbed in."

print "%s" %tabby_cat #打印出来        I'm tabbed in.