File "ex_6.py", line 4, in (module)
y = "Those who know %s and those who %s." (binary, do_not) # used %
TypeError:‘str‘ object is not callable
少写一个%
转义字符
\\ \
\‘
\"
\a
\b
\f
\n
\N{Name}
\r ASCII
\t ASCII
\uxxxx
\Uxxxxxxxx
\v
\ooo
\xhh
%r 输出的是完整的数据
%s 输出字符
原文：http://my.oschina.net/u/2432914/blog/490326